While both the PlayStation 3 and Xbox 360 will be seeing a re-release of Capcom's classic 2D fighter Marvel vs Capcom 2, Wii owners won't be seeing anything of the sort.
While this may have been obvious from the fact the game's release announcement failed to mention Nintendo's console, for anyone who hadn't quite caught on, Capcom's Christian Svensson has spelled it out, explaining that, because the company "don't actually have any retail rights on this project", it can only be offered as a downloadable title.
While this is no problem for the PlayStation Network or Xbox Live Arcade, "there's no way to get anywhere near the Wiiware filesize limit here". Despite the Wii hardware itself being more than capable of handling an old Dreamcast port. So it's not happening, and it doesn't look like it'll ever happen.
Sorry.