Apparently a new entry in the popular Versus series could be announced in the next few weeks at Playstation Experience and the Capcom Cup. The rumors come from a series of well connected fighting game streamers and competitors. On top of that, there are a few screenshots of what could potentially be a teaser for MvC4.
The teaser is said to be reminiscent of the new Marvel Studios logo. None of this is entirely conclusive as just a plain logo on a black background tends to lend itself well to fakes.
Source: NeoGAF
