At least 11 new pokemon. 
I'm interested but slightly annoyed, it is less than a year after BW2, so not a lot of time to get the full pokedex in that before the new game.
None of the starters are all that appealing to me, will have to wait to see evolutions, typing and base stats will probably make my decision for me for the first time. Sad that the starters all are so bland and unappealing. The water starter reminds me of Palpitoad, the Fire starter of Zorua and the grass starter is like a patrat wearing a green hat.
Unless we get something new type wise for the starters (not, Grass poison, water ground or fire fighting), I will be feeling that more than ever that the developers have run out of fresh ideas.
Looking For: Wreckers Saga TPB Collection (with Requiem)