We've already witnessed Naruto Uzumaki passing puberty and his recent gaining of maturity. Allen Walker's abilities reaching General like status. Ichigo's Hollow ability and the fall of the invincible Espada.
D.Gray-Man will be rolling back in 2009. Soul eater will continue its 'madness' with the rebirth of 'kishin'. And.. Ben 10 will become a teenager!! Heck... the action figures are already out in stores!