Looking Into The Future

So, I have to say that season 3 of Bolt's story is by far the most "planned out" one that I have. And it's putting some things into perspective. Where Bolt is concerned, I feel like he's still got one or two seasons left in the tank before he's done telling his story. But even when he's done, I think I'm going to keep going. I've been discussing a number of concepts with a good friend of mine for what will likely be this story's sequel series.
I know what kind of series it's going to be, but I'll provide no spoiler.
What kind of story do you think it's going to be? I'd love to see your guesses!