Street Fighter V did okay (albeit a bit below expectations), but Capcom is aware that it could have done better if they made some different decisions, judging by their comments during the investors' briefing. Capcom will probably take that to heart going forward. That said, SFV is a massive success from a competitive perspective, going by the 4k+ SFV entrants at EVO this year.Marvel and Sony making the deals. If SFV was a good experience for them, maybe they're looking at doing the same in locking down MvC4.
Overall, Sony has the FGC in a death-grip. MvC4 being a PS4 console exclusive would be icing on the cake for Sony.