Tatsunoko vs Capcom is a real threat for super nerds of all kinds. You have an exiting roster of anime characters featured in shows from Studio Tatsnoko Production going head-to-head with fighting game icons from Capcom! The game is being localized here and with additional content.
I suggest seeing the HD quality version of the game here :
For more info go here: http://en.wikipedia.org/wiki/Tatsunoko_
Another game being released and worked on is Teenage Mutant Ninja Turtles Smash Up
"It has been in development for about a year, and is being developed by Game Arts, who had previously worked on Super Smash Bros. Brawl, and several former members of Team Ninja, who previously worked on Ninja Gaiden II."
for more information click here: http://en.wikipedia.org/wiki/TMNT_smash