Since the recent 6th generation Pokemon has made so much money, it should be no surprise a 7th generation is now in the works for 2015.
Info from a Ken Sugimori interview:
http://pk-mn.com/n/pokemon-7-sedai-simple
Basically he says:
#1: There are too many moves, items, abilities, and Pokemon in the series. He’s looking into consolidating and/or removing things to simplify power creep. He does admit however, that removing Pokemon would cause a fan backlash, so it would probably just focus on removal of moves, items, and abilities. It’s true… a lot of things do the exact same thing, just look different or have slightly altered effects.
#2: He admits they’re running or already ran out of ideas for original Pokemon… that’s why they’ve expanded the list of what can be Pokemon (i.e. ice cream, a set of keys, washing machines, etc). So when critics claim X/Y seems like they’re scrapping of the bottom of the barrel, they might be on to something… There’s officially 718 of them today. Hard to believe it started with just 151.
#3: Generation 7 will be more like Generation 1 (Red/Green), instead of Generation 6 (X/Y).
#4: His favorite Pokemon of all time is Gengar. That explains why he got a Mega Evolution.