Evo of Lunatone, and Solrock? Trainer customization (PLZZZZ) More megas? New Pokemon? New moves? (Tickle still my favorite move)
None. Personally I think Nintendo have kind of took out the fun out of Pokemon games. Moon and sun look okay but I don't plan on getting anything new.
I'm really excited about this game :D But I wonder if the game is going to do anything about these two pokemon: Will they be legendaries? Most likely not, but maybe they have important roles in the upcoming games...