Sponge Bob has the potential to be a good 'licensed IP'. But, it may skew too young, demographic wise, to replace Springfield, which skews older demos. With DM/Minion mini land and the Dreamworks
in the former Kidzone, another very young oriented IP land like Spongebob, would be too much weight to young kids in USF. While I realize that there's a lot of Sponge Bob fans in the teen and twenties IU fan base,
I doubt that same interest exists in the general population, outside of kids. Sponge Bob would probably work better in IOA, if they ever replaced the Toons.