Though honestly, we've confirmed Season 9 which'll take us up to at least 2018 before anything could happen.
My issue is that the only other cartoons I'm really watching are all web series' like Bravest Warriors and Bee & Puppycat, the problem is that because they're web series' they get about 6 episodes every million years.
So when AT comes to an end (God forbid) I'll be royally screwed unless an equally-enchanting show emerges
I can't see how the world will be when AT ends, i.e., I can't imagine how it will feel when I have no new episodes to look foward to. But that is still about 2 years away, so why even ponder it? Instead of making yourself sulk over the inevitable, cherish every moment of the show.