Pacific Rim: Atlantic War

Plot
In 2009, massive alien monsters called Kaiju began emerging from an interdimensional portal called "The Breach" at the bottom of the Atlantic Ocean and attacking coastal cities. In response, humanity builds massive robots called Jaegers. Each is co-piloted by two or more people who share a mental link via a process called "Drifting" to share the mental stress of piloting the machine.

In 2012, brothers Thomas and Colin Maguire piloted the British Jaeger, Paladin Green, to defend Brighton from a Category-3 Kaiju codenamed "Nosebleed". During the confrontation, the Kaiju unexpectedly pierces the Jaeger's armor, ripping out half of its head and killing Thomas. Colin, piloting the damaged Jaeger alone, manages to kill Nosebleed and walk Green back to shore by himself before collapsing. Traumatized by the loss of his brother and the strain of drifting alone, Colin quits the Jaeger program.

Five years later, world leaders decide to cease funding for the Jaeger program and replace it with coastal defense walls, since Kaiju are appearing more frequently and Jaegers are being destroyed as quickly as they are built. The walls are quickly proven to be ineffective. The remaining Jaegers are relocated to Barcelona under the command of Marshal Kyle Jefferson, who plans to try to destroy the Breach using a tactical nuclear weapon, even though previous attempts to do so have failed.

Colin, now working in wall construction, is recruited by Pentecost for the mission. Traveling to the Barcelona base, the Shatterdome, Raleigh is introduced to Anna Cortez, the director of the Jaeger's restoration program and Jefferson's adoptive daughter. Four Jaegers remain in operation – the refurbished Paladin Green, the German Brenner Gamma, the Brazilian Perfurador Black, and the Italian Bomber Striker, piloted by a father-and-son team, Paolo and Massimo Leone. To find a new co-pilot, Colin participates in tryouts and decides that Anna is "drift-compatible". During their first test, Colin falls out of alignment after reliving Thomas's death, causing Anna to become lost in the memory of a Kaiju attack on Valencia, nearly firing Paladin's energy cannon. As a result, Jefferson grounds Anna.

Jefferson consults Kaiju experts Giuseppe Mancini and Ferdinand Schneider. Ferdinand claims the Breach will stabilize and the Kaiju will increase in number, but it will allow the assault to succeed. Giuseppe suggests attempting to drift with a Kaiju's brain to learn more about them but is dismissed by his colleagues. He attempts it regardless, discovering that Kaiju are bioweapons grown by alien colonists. Jefferson instructs Giuseppe to find a black market dealer from Albania, Andi Dervishi to obtain another Kaiju brain to drift with it. Mancini realizes the Kaiju hive mind gained access to his brain, since drifting is a two-way link, and the two newest Kaiju to emerge, Backbite and Sandstorm, are sent simultaneously to find him in Barcelona.

All Jaegers except Paladin Green is dispatched to intervene. The Kaijus destroy Perfurador Black and Brenner Gamma, while Sandstorm disables Bomber Striker with an EMP blast. As the only non-digital Jaeger, Pentecost sends the hydro-powered Paladin Green to help. Green manages to defeat Backbite and Sandstorm. Giuseppe and Andi go to harvest Sandstorm's secondary brain but discover she is pregnant. The infant Kaiju bursts out and devours Andi before choking on its own umbilical cord. Giuseppe and Ferdinand drift with the infant's brain, discovering that the Breach only opens in the presence of a Kaiju's DNA.

Jefferson reveals to Colin he has terminal cancer due to piloting a 2010 production Jaeger, which lacked radiation shielding. His last mission was in Valencia, where he saved a young Anna but piloted the Jaeger alone since his co-pilot died. Two new Kaiju are detected guarding the Breach, prompting Paladin and the repaired Bomber, piloted by Jefferson and Paolo, to go ahead with the assault. Approaching the Breach, the Jaegers are attacked by the Kaiju, and a new "Category Five" Kaiju, Splatter, leading to Bomber being crippled. Jefferson and Paolo decide to sacrifice Bomber while Paladin acts as the nuclear bomb to seal the Breach. After Striker self-destructs, Paladin slaughters Splatter, riding its corpse into the Breach. Colin ejects Anna from Green, manually triggers Green's self-destruct, and ejects himself before it explodes and seals the Breach. Colin and Anna's escape pods surface in the Canary Islands; they embrace as rescue helicopters arrive, as Don Omar's Danza Kuduro plays in the background.