Following the unveiling of Zero, word has it that Marvel Vs. Capcom 3 will see the addition of more Mega Man reps: classic series Mega Man, and Mega Man.EXE of Battle Network fame.
According to a source at Joystiq:
"A source shared what they claim to be the full roster for Marvel vs. Capcom 3, containing no fewer than 18 characters who have yet to be announced by Capcom, in addition to a new "War Machine" look for Iron Man. The list includes characters like the Red Arremer, Mega Man (in Battle Network and classic styles), and Frank West/Chuck Greene (probably as alternate versions of the same character) on the Capcom end, and Ultron, Squirrel Girl, and Thanos from Marvel. The most random character on the list is probably Victor Delacroix from 2003's Chaos Legion."
If you read it carefully, it sounds like .EXE isn't necessarily a character on his own, rather, a skin for Mega Man...
Anyway, in support of the list's legitimacy, Joystiq says "it's worth noting that She-Hulk and Zero, both appearing in the list from our source, were announced after we received it." Indeed, they were.
More MvC3 character reveals are set to hit later this week so maybe then we'll have a better idea just how legitimate the list is. Make of it what you will, for now.