This set is fantastic man, I'd definitely be in, probably in either DCS or SA.. That said, I feel the whole style of adventure time, playful, kinda soft and round, is sooo much more suited to SA. I think of Jinn, and all the other weird and wonderful characters and just get a SA vibe.
That said, the shorter wait time on DCS might sway more people to buy, and also the fact that the market is pretty saturated with SA at the moment.
I still just can't shake the feeling that of all the SA sets proposed this one really does go with the feel of SA.