New info up from CoroCoro, the highlights:
- 2 years after first games, new playable characters
- New rival
- Unova is partially frozen(?) opening up new areas.
- Seems to be some new gym leaders.
- New starting town
- Also seems there will be a mix of old pokemon to catch before beating the game instead of strictly new pokemon
So looks like slightly more than the usual third version this time. Serebii has the scans up.