It's obviously a new gen, so don't expect to battle or trade with these DS games.
but if they eliminated a transfer mechanic that brought pokes from Gen V to Gen VI, I don't think that would boil over too well. Way too many cherished pokes by trainers alike, plus, so many legendaries and individual pokes would be unnattainable. Gen I thru Gen V to be specific. I'm actually pretty proud of my Mewtwo from Leafgreen version. It's in my Pokemon White PC. It's already come with me this far, why not a bit further?