I think if it continues the way it is, it has the potential to be a classic via the likes of Invader Zim...with a cult following and massive underground pop-culture influence.
Cartoon Cartoons from 90's/2000's >>>>>>>>>>>>>>>>>>>>>>>> Adventure Time, Gumball, Regular Show.
Maybe it's because of Nostalgia but these new shows are kinda mediocre imo.
Of course the cartoons now won't live up to your childhood classics but i think Adventure Time could possibly stand amongst the classics in years to come