Resident Evil 6 still sold rather well. Street Fighter X Tekken is only one Street Fighter game. They made their money from MVC3 and SF4 (and it's many many versions). Capcom still has Dragon's Dogma that sold very well too.
Capcom is totally going under after having a huge boost in profits this year >.> Even if DmC doesn't sell ridiculously well, that's not the game that's ruining the company. Far from it.