Turtles 4-Ever

Turtles Forever 2 is an upcoming television film produced by Nickelodeon Animation Studio and Mirage Studios. The movie is a crossover film featuring four different incarnations of the titular heroes throughout the franchise's history: the original Prime Turtles team from the 1984 comic book series, the light-hearted, family-friendly characters from the 1987 animated series, the darker, more serious cast of the 4Kids' own 2003 animated series, and the 15-year-old cast of the Nickelodeon's own 2012 animated series - in an adventure that spans multiple parallel universes. It also marks the finale of the 2012 animated series. This movie was produced in celebration of the 31st anniversary of the Teenage Mutant Ninja Turtles franchise.

1987 Series Characters

 * April O'Neil (Renae Jacobs)
 * Bebop (Barry Gordon)
 * Donatello (Barry Gordon)
 * Foot Soldiers
 * Krang (Pat Fraley)
 * Leonardo (Cam Clarke)
 * Michelangelo (Townsend Coleman)
 * Raphael (Rob Paulsen)
 * Rocksteady (Cam Clarke)
 * Shredder (John DiMaggio)
 * Splinter (Peter Renaday)

2003 Series Characters

 * April O'Neil (Bettina Bush)
 * Casey Jones (Yuri Lowenthal)
 * Donatello (Sam Riegel)
 * Foot Ninjas
 * Hun (Kevin Michael Richardson)
 * Karai (???)
 * Leatherhead (Bumper Robinson)
 * Leonardo (Michael Sinterniklaas)
 * Michelangelo (Brian Donovan)
 * Purple Dragons
 * Raphael (Roger Craig Smith)
 * Splinter (Keone Young)
 * Utrom Shredder (???)

2012 Series Characters

 * April O'Neil (Mae Whitman)
 * Bebop (JB Smoove)
 * Casey Jones (Josh Peck)
 * Donatello (Rob Paulsen)
 * Fishface (Christian Lanz)
 * Foot Bots
 * Ice Cream Kitty (Kevin Eastman)
 * Irma Langinstein (Kate Micucci)
 * Jack J. Kurtzman (Robert Forster)
 * Karai (Kelly Hu)
 * Kirby O'Neil (Keith Silverstein)
 * Kraang (Nolan North)
 * Kraang Prime (Roseanne Barr)
 * Leatherhead (Peter Lurie)
 * Leonardo (Seth Green)
 * Metalhead
 * Michelangelo (Greg Cipes)
 * Mutagen Man (Brief)
 * Newtralizer (Danny Trejo)
 * Rahzar (Clancy Brown)
 * Raphael (Sean Astin)
 * Rocksteady (Fred Tatasciore)
 * Slash (Corey Feldman)
 * Splinter (Hoon Lee)
 * Shredder (Kevin Michael Richardson)
 * Tiger Claw (Eric Bauza)

Mirage Characters

 * Donatello (Yuri Lowenthal)
 * Leonardo (Steven Blum)
 * Michelangelo (Derek Stephen Prince)
 * Raphael (John DiMaggio)
 * Shredder (Jim Cummings)

Miscellaneous

 * Kevin Eastman (offscreen, voiced by himself)
 * Peter Laird (offscreen, voiced by himself)

Quotes
2003 Donatello: Donatello, stop this nonsense and let's go stop the Shredder.

2012 Donatello: Donatellos, I can't help it. I loved April, because she wants to become the greatest scientist just like her father and I want to become the greatest scientist too. She's so gonna like me. If I failed to impress April, she totally hates me, maybe forever.

2003 Donatello: Donnie, you cannot fall in love with April, and you're not exactly her true love.

1987 Donatello: He's right; you're just a mutated reptile.

1987 and 2003 Donatellos: You... are... A TURTLE!

2012 Donatello: For how much longer?! One more rip, and April's cheating on me. And what do I do then, Dons? Huh? Huh? You tell me!

2003 Donatello: Somewhere in that shell is a turtle who taught me that life's only worth living if you're being taught by Master Splinter. And I think your Master Splinter wants to become the mutant rat just like our counterparts' Master Splinter in their dimension. And in our dimension, I do the way to let Casey to fall in love with April, because I believed him.

2012 Donatello: Well, you wasted your time.

- 1987 and 2003 Donatellos tried to give 2012 Donatello a reason.