Well, I don’t know much about business or marketing, or about the games you mention. I do know that Pokémon is one of the big items for Nintendo’s portable consoles, and I also doubt that those consoles will be able to support an MMORPG any time soon. So, assuming Nintendo want to go on selling consoles, I don’t think that will happen for the foreseeable future, no.
As for how it would do… well, you should probably ask a marketer or entrepreneur; such things are beyond me. I imagine anything with “Pokémon” on the label would sell reasonably well.