To be honest Im just going to wait things out first, see how everything is going to play out (though I might get UMvC for Christmas, hmm....)
As a fellow megaman fan it is somewhat depressing that not even the original megaman was put in game (never played as him, but it still would have made the cast more complete). All the other games like street fighter, darkstalkers, and devil may cry all got the poster characters of their respected games. As great a character Zero is, X is the main poster character for his respectful game (called megaman X for a reason). Or at least the original megaman would have done the trick.
Capcom logic kinda shoots themselves in the foot by not putting a single blue bomber in the game, yet every other game gets their poster characters for UMvC. Even as a skin, that doesn't make megaman as an actual character in game.
Still, we may be jumping to conclusions, who knows what exactly that X DLC will be used for. He might just be a DLC character as opposed to being a DLC alternate costume of Zero.