I hated Ash past the age of 7.
But he'll never be changed or replaced, simply because they will not take a risk like that. They should've swapped him a long time ago, back when he was still in Kanto. But hey, whatever.
It's odd, because obviously Ash isn't getting older, either. Adding in a new protagonist for each region could've been a very nice idea.
I really wish they'd make a series that looked like those B and W 2 promos. I could tell my parents for once I actually want to watch Pokemon.