Platinum Games along side Activision have announced that there will be two sets of DLC arriving free to anyone that has preordered Teenage Mutant Ninja Turtles: Mutants in Manhattan. Both of these sets will be cosmetic only.
To gain access to the four Rock N Roll costumes for Leonardo, Raphael, Michelangelo and Donatello to wear in-game, you must predorder the game from GameStop. However, if you preorder the game from either the PlayStation Store, Steam or the Xbox Store, you will gain access to four Samurai skins, which, in my opinion, look pretty sweet.
Teenage Mutant Ninja Turtles: Mutants in Manhattan is expected to release on May 24th in North America and May 27th for those of you in Europe.