I am so buying this when it comes out this month. Not only did they add 4-player simultaneous gaming to it (finally) so you can play all four turtles at once, but they also added some unlockable characters like Splinter and Casey Jones.
But the best things of all...
"Longtime fans should also appreciate the game's other unlockable bonus: an emulation of the arcade's original 1989 Teenage Mutant Ninja Turtles side-scrolling brawl-fest." YES!!!!!!!!
That was one of my all-time favorite multiplayer arcade games (along with the Simpsons one) and to finally have the four player version perfectly emulated on a console is going to fucking rule.
