Now who’s a big boy? That’s right, Galactus is! This rather over-sized final boss will be available to play in Ultimate Marvel vs. Capcom 3. There is a catch however – he, you guessed it, won’t be available to play from the get go… well that is (i don’t know if this really is a spoiler, but read spoiler alert if working out how to unlock characters gets you off) unless you have a save file from MVC 3: Fate Of Two Worlds on your console of choice. If you are arriving late to the MVC 3 party however, you will simply have to toil the battlefields and earn yourself over 30,000 PP.
Thanks to Siliconera for the info.