You can file this one under rumour for the time being but there are a few interesting signs which indicate that Capcom may be working on a third title in the popular Marvel Vs. Capcom series.
According to a source at Team Spooky, Capcom is going to announce the game this year. Your gut instinct may be to call BS on such a prediction, but you should know that this same poster also correctly predicted the Super Street Fighter IV roster last year.
To add more fuel to the flames, Kotaku's interview with Tatsunoko vs. Capcom: Ultimate All-Stars producer Ryota Niitsuma from a while back hints at a possible future instalment in the Vs. franchise:
I would love to do more versus series, more types of games like Marvel Vs. Capcom 2. There are all of these possibilities working with other companies, seeing what we could do with them. There are so many game companies I'd love to work with. If sales are really good (for Tatsunoko vs. Capcom: Ultimate All-Stars) then you can see an announcement within this year.
While that obviously falls well short of being an official confirmation of anything at all, it does prove that Capcom is receptive to the idea of more games in the series, and we're pretty sure that Marvel likes money enough to consider being involved with such a venture. The recent XBLA and PSN release of the second title certainly proves that the two companies are willing to do business.
The most exciting aspect of all this is that with Tatsunoko vs. Capcom: Ultimate All-Stars proving to be something of a critical success on the Wii, Capcom may even consider bringing this third Marvel Vs. Capcom title to the Wii - if it actually turns out to exist in the first place, that is.