Absolutely not. The Sony crossover fighter looks and sounds terrible, and they have more characters than Microsoft does. Sony doesn't have anything as iconic as the Chief, but they have more middle of the road characters. Marcus Fenix is a ridiculous character (seriously WTF?) and doesn't belong to MS but he would fit a game like this better than someone like Drake, who will just look like some generic douche.
I mean what is MS going to do? License some generic soldiers from Call of Duty? Add a sports car from Forza?
The Sony fighter looks bad enough, and comes off as a desperate clone. Only Nintendo can pull it off because only they have a stable of truly iconic gaming legends. Only the Chief comes close to Nintendo's character's, and that's one guy.
The characters that defined the PlayStation brand (Solid Snake, Lara Croft, Crash Bandicoot, characters from Final Fantasy, Resident, Evil, Tekken, etc.) all the really important ones don't belong to Sony.







