Transformers: The Darkest Hour

Transformers: The Darkest Hour is a movie that will take place immediately after Transformers: Rise of the Unicronians, directed by Steven Spielberg.

Plot
Optimus Prime is dead, and Galvatron and his Decepticons have forced the Autobots into retreat. Only by recruiting new allies, and the rise of a Chosen One, can the galaxy be saved.

Humans

 * Daniel "Buster" Witwicky: Paired with Bumblebee, Buster becomes a lead human in the Autobot Alliance.
 * Sari Sumdac: Buster's childhood sweetheart. Speaks with a Southern accent.
 * Chip Chase: Paired with Hot Rod, Chip becomes mobile with his own Exo-Suit, and uses his aptitude for the defense of the Galaxy.
 * Marissa Faireborn (played by Natalie Portman): Earth Defense Command or EDC leader.

Autobots
In disarray after their leader and many of their warriors are killed, the Autobots prepare a last stand against the Darkness.
 * Springer:  (voiced by Patrick Warburton): Autobot leader until near the end of the movie: rransforms into an AgustaWestland Apache helicopter; is an "old school" leader who finds himself overwhelmed by incredible odds.
 * Hot Rod (voiced by Chris Pine): Transforms into a 2012 Chevrolet Corvette Grand Sport. Travels to planet Chaar to bring back lost Autobots and Decepticons for the battle against Unicron.  Kills Galvatron on Earth, then takes the battle to Unicron.  Is nearly killed by Nemesis Prime, until the matrix anoints him Prime, and gives him power to use the Star Saber (The Autobots' version of King Arthur's Excalibur) which was once wielded by Prima, leader of the original Seven Primes.  Primus (spark now freed from Unicron's prison) informs him he is a decendant of Prima himself, and Optimus' son. Using both the Star Saber, the Matrix of Leadership, and the Key of Vector Sigma, the anointed Rodimus Prime manages to redeem Optimus Prime, destroy both Galvatron and Unicron forever, and begin the process of rebuilding Cybertron on Mars.  Now transformes into a Tiller-Ladder Fire Truck.
 * Bumblebee: "Buster" Witwicky's guardian and becomes a chief leader of the Autobots. Retains his 2012 Chevrolet Camaro form.
 * Sideswipe (voiced by James Remar): Still one of the fasted Autobots and is combat instructor. Retains his Chevrolet Corvette Stingray Convertible mode.
 * Prowl (voiced by Rob Paulsen): Military strategist and one of Optimus Prime's chief lieutenants. Transforms into a 2012 Ford Taurus Police Interceptor.
 * Perceptor: The new Autobot scientist, Wheeljack/Que's old friend. Transformers into a minivan packed with science equipment.
 * Kup (voiced by R. Lee Ermey): Still keeping the younger 'bots on the right course. Transforms into a 1953 Ford F-100 pickup.
 * Wreckers: Mechanics and commando team.
 * Roadbuster (voiced by Ron Bottitta): Springer's second-in-command. Transforms into Dale Earnhardt, Jr.'s NASCAR Sprint Cup Series Chevrolet Impala #88 AMP Energy/National Guard stock car.
 * Leadfoot (voiced by John DiMaggio): Transforms into Juan Pablo Montoya's NASCAR Sprint Cup Series Chevrolet Impala #42 Target stock car.
 * Topspin (voiced by Bill Fagerbakke): Transforms into Jimmie Johnson's NASCAR Sprint Cup Series Chevrolet Impala #48 Lowe's/Kobalt stock car.
 * Targetmasters: Autobots who fled the war long ago, and with the help of the Nebulons have built Chaar into a peaceful world.
 * Alpha Trion (voiced by William Shatner): Former Autobot leader who led the Exiles to Chaar, fed up with the war. He keeps the Star Saber safe until Hot Rod's arrival.
 * Ultra Magnus (voiced by Liam Neeson): Prime's brother who leads the Targetmasters to earth to backup the shrinking Autobots. Transforms into a Peterbilt 379 and armed car carrier trailer.
 * Blurr (voiced by John Moschitta Jr.): Transforms into a Formula-1 racecar.
 * Cliffjumper (voiced by Dwayne Johnson): Tough as nails though small. Transforms into a 2012 Ford Fiesta.
 * Dinobots: A team of Autobots who chose dinosaurs as alternate modes. The reason behind their speech impediment is because of various battles against their former Decepticon allies.
 * Grimlock (voiced by Richard Epcar): Transforming into a mechanical Tyrannosaurus, Grimlock is the team leader of the Dinobots and one of Optimus Prime's chief lieutenants. Grimlock has always dreamed of power and the privilege it brings. Despite his hunger for power, however, he has always considered the needs of others before himself. He believes it is the responsibility of the powerful to protect those less fortunate - a belief he intends to aggressively enforce now since he's former Autobot commander Sentinel Prime betrayed his beliefs before his death.
 * Snarl (voiced by Steven Blum): Transforming into a mechanical Triceratops, Snarl is second-in-command of the Dinobots. Called "Slag" in the film.
 * Sludge (voiced by Tom Wyner): Transforming into a mechanical Brachiosaurus, Sludge is the wise elder of the Dinobots whose speech impediment isn't as bad as the others.
 * Swoop (voiced by Lex Lang): Transforming into a mechanical Pteranodon, Swoop serves as the Dinobots' aerial recon scout.
 * Omega Supreme (voiced by Michael Clarke Duncan): Transforms into a giant Autobot spaceship similar to the Ark and the Xantium, called the Axalon. One of the Great Guardians of Cybertron, the Omega Sentinels. Unearthed by the Autobots in the outback of Australia some time after the battle in Chicago, Omega Supreme is appointed Guardian of the new Autobot City.
 * Primus (voiced by Patrick Stewart): The "god" of the Autobots, his spark and essence were contained within the Key of Vector Sigma, until Unicron's heralds stole it and gave it to him. Was released when Hot Rod fought Nemesis Prime, and anointed Hot Rod as Rodimus Prime.  He helps the transformation fo Mars into New Cybertron when Unicron is destroyed.

Villains

 * Unicron (voiced by Ian MacKellan): Universal Dominator and Chaos Bringer whose alternate mode is a planetoid similar to Cybertron, Unicron is a being from another dimension who came with his minions, the Unicronians through a wormhole from Cybertron's destruction. He prepares to consume all the Cybertronians in the Solar System; along with the system itself.  Is destroyed by Rodimus Prime.

Decepticons
Since Cybertron and Megatron's destruction, the Decepticons have been in disaray, until Unicron offers himself to be their new home. Soon after Megatron returns as Galvatron, they plan to use the Dark Energon inside Unicron to revive all the dead Decepticons on earth so they'll have an army of the undead for Unicron.
 * Galvatron﻿ (voiced by Frank Welker): Made from the dead corpses of Megatronus Prime the Fallen, Sentinel Prime and Megatron through Unicron's power, Galvatron takes his rightful place as Decepticon Leader. He's alt-mode is slightly similar to Megatron's jet mode in the 2007 film. Because he's body was made from three Decepticons, he's got the minds of the Fallen, Sentinel and Megatron in his head and they are in constant battle for domination. Because of this, it causes Galvatron to go insane, blasting minor Decepticons within range of his new Fusion Cannon. Is destroyed by Hot Rod, and then revived and redeemed by Rodimus Prime.
 * Cyclonus (voiced by Steven Blum): New second-in-command, Cyclonus is a being whose loyalty to Galvatron is so intense as to exclude most other emotions and interests from his mind. Cyclonus does his best to keep the Decepticons in order after Unicron offers himself as their new home, and organizes them to retrieve the following dead Decepticon corpses for Unicron. Transforms into a fighter craft similar to that of a Sukhoi Su-47 fighter jet.
 * Scourge (voiced by Fred Tatasciore): Galvatron's implacable tracker and leader of his own cadre of huntsmen, the Sweeps, whom he sends to retrieve the following dead Decepticon corpses for Unicron to create a new leader for them. Transforms into a hovercraft similar to that of a Lockheed F-117 Nighthawk.
 * Sweeps: Decepticons similar to Scourge in appearance, they are sent to retrieve the dead corpses of Megatron, the Fallen and Sentinel Prime for Unicron.
 * Predacons: Unicron has created these as the new force of terror throughout the Galaxy. They are nearly indefeatable, and when combined as Predaking, their power is behind only Unicron and (during his saner moments) Galvatron. They have taken oversized versions of Earth creatures, and see the Dinobots as their chief nemeses.
 * Razorclaw: Leader of the Predacons, transforms into an Lion.
 * Rampage: Predacon second in command; transforms into a Tiger and has less control and more of a thirst for destruction than his leader
 * Divebomb: Predacon scout, transforms into an Eagle.
 * Headstrong: An especially aggressive Predacon who transforms into a Rhinocerous.
 * Tantrum: Another especially aggressive Predacon, transforms into a Bull.
 * Nemesis Prime (voiced by Peter Cullen): Optimus' spark is tortured and corrupted by Unicron, and transforms into the dark and evil Nemesis Prime. Retains his trailer which he uses for his Super Mode as well as his Peterbilt 379 18-wheeler mode. Is redeemed by Rodimus Prime's use of the Star Saber and Key of Vector Sigma, and revived as Optimus Maximus.

Quotes:
Primus: "Arise, Rodimus Prime!"

Deluxe Class

 * Mirage
 * Prowl
 * Kup
 * Hot Rod
 * Perceptor
 * Swoop

Voyager Class

 * Springer
 * Grimlock
 * Snarl
 * Cyclonus
 * Scourge

Leader Class

 * Optimus Prime
 * Galvatron
 * Sludge

Supreme Class

 * Omega Supreme
 * Unicron