How long was this show intended to last?

[neatoman]

Obviously two seasons isn't much, especially compared to the previous cartoons. And while the show doesn't end on a cliffhanger (aside from the tease that they're going to make a movie) it does seem as if there was more intended to be made. The question is, how much? Given that it's a kids' show, seven seasons or more is a stretch. Like seriously, anyone who honestly thinks a children's cartoon is actually meant to last at least seven seasons from the start is an idiot.

Anyway, how long? Exactly as long as it ended up being? Three seasons? Four seasons? Indefinitely?