My bets, in vague order of likelihood:
Honedge, Orotto, and MAYBE 1-3 other Pokemon. Not the huge dump from last time.
Yveltal and Xerneas typings. Almost definite now that Fairy is out of the bag.
Mewtwo and movie info. (Any additional mons revealed may be from the movie)
Probably discussion of at least one new feature (like Mon-Amie or those wrist devices)
Potentially Professor, maybe evil team or some other characters.