I really agree about the story. It sure is the best of any pokémon game prior to this. Not only the rivals; it's amazing how Team Plasma is involved... Also, their music. All of the new music is actually the best EVER in a pokémon game. TP's reminds me of something really RPG-ish.
The gym leaders' appearences, Cynthia's return... So many nice touches and a really, really good plot, indeed. And so many things to do after the elite. They really outdid themselves this time!
But nothing's perfect, of course. Despite the fabulous happenings, region and Pokémon, I feel like that was too little of new things... As in, mechanics and stuff. It doesn't kill the experience at all, but it is a kinda of a let down for me. I feel like there should be more new moves, abilities, type combinations... And, of course, some changes. Breeding, types, experiences, weather, EVs, IVs, natures, etc., etc. No, I can't think of anything to improve them, but I hoped so much they would have done so. And, plus, added new details.
Yeah, yeah, gotta wait for the next one!
Still, I'm very satisfied and I hope playing the english versions be as much as fun. And, please, 'Grey' version, revolutionate!
On topic, I'm betting Kyuremu will have a different form. Something really different, that makes its stats equal to Reshiram's and Zekrom's and involving the moves obviously learnt by itself. Also, it looks awesome, but kinda incomplete. Can't wait for its official art so I can actually judge it!