Holy crap, I wasn't expecting a new generation this soon. We haven't even gotten a Stadium game for Gen V yet!
Note in the debut trailer that the starters all use a move that's separate from their main type: Chespin uses Aerial Ace, Fennekin uses Confusion and Froakie uses... Close Combat, I think? This is p. much grasping at straws considering how early on we are in the release cycle, but if the connection is there then we might get Grass/Flying, Fire/Psychic and Water/Fighting for starters this time - nothing really new, but interesting types nevertheless. At the very least, I hope we don't get a repeat of Gen V's disappointment.
I'm really hoping this turns out to be a balancing generation like II and IV were, as Gen V OU as it stands right now is kind of insane. At the very least, I hope Drizzle, Drought, Sandstorm and Hail get nerfed back to the stone age, or at least changed so that the weather expires a few turns after the setter leaves the field. A return to Gen IV rules (i.e. autolevel and species clause w/o dealing with a ridiculous ban list) and new evolutions for Farfetch'd, Corsola, Qwilfish, Mawile, Sableye and other Pokemon like them would be nice as well.