>>89836531>new Steven UniverseSeems like it's more in line with Gravity Falls.
That aside, the setting seems to imply that we'll only have two recurring characters. I don't think that's enough to really catch a lot of people. It will have to come down to the world building and the mystery aspect to lure fans in.
Lore is great and all but that takes time to build up in a series. The show will need to be entertaining on an episode to episode basis to be successful. This usually needs other characters to play off of. The setting of the show can give us any number of interesting settings and characters within.
The problem with that is that the show writers will need to spen a lot of time thinking up new settings and characters. If they try and come up with a new settings for each episode, I can see them burning out or running out of ideas. Or coming up with poor ideas.
I think it'll come down to how they handle that aspect.