Nintendo will not give it up to them and I'm not sure you'd want them to either. All the 'magic' would probably get neglected under the watchful eye of Microsoft. No trading cards, no websites, no nothing. It's best the way things are for now. until we see that Microsoft is mature enough to handle a steady title for more than 20 years. . . (holy cow.) I have little faith that they could handle the scope of the series. Anime, manga, etc.
Not sure how much influence Microsoft has over non-gaming media like trading cards. But I would like to turn some attention towards 343 Industries, the current caretaker of the
Halo franchise, which isn't far from its 14th anniversary. No cards in sight (which I'm not too hung up over, to be honest, but there's several fanbases in which I would be a minority in that regard), but they've released two live-action miniseries/films,
Forward Unto Dawn and
Nightfall, as well as a collection of anime shorts whose name I can't immediately remember, a number of comic series such as the current
Escalation, about a dozen books, and one graphic novel that I can immediately remember. What I'm suggesting, however wishful, is that Microsoft, Sony, and Nintendo provide the means with which to play the game, which I believe is the case with multiplatform games such as
Fallout, while Game Freak handles the game itself. As far as expanded media, I'm sure there'd be some way to keep the trading cards and the manga going, and as far as the anime goes... I think we all have varying opinions about Ash Ketchum and his unending-and-somehow-only-a-year-long journey. Me, I think they should just quit coming up with new Pokémon for a number of reasons, one of them being so Ash can realize this dream and simply become a legendary figure in the anime, like Red is to the games, then come up with a new series entirely.