woah, holy s...
The double crossover SFxTEKKEN (SF4 engine with Tag system from tekken) and TEKKENxSF (with Tekken6 engine)
here is already gameplay footage http://www.youtube.com/watch?v=N6U7jZ-qMfI
and another awesome cinematic trailer was DC universe Online!
The game will probably suck, but the trailer is kick-ass!