There will be a 3rd game. A lot of things point at this.

Rewatch the opening moving in pokemon black/white. You will see two girls that the movie aimed at for a long time. Now, remember playing the game... What? You didn't see those two cool girls in the game? That's weird... me neither. Why would they show those two girls that stick out, but not in the game? Because they will be in the 3rd game. Not sure how, but i call it foreshadowing.