Yeah, I’m baffled by the arbitrary “one land/ attraction per IP” thing. Both Diagon and Potter Paris are masterpieces and I’d love to have more (better) Star Wars lands. Marvel in California shows the kind of bland mess you can get if a huge, diverse IP is forcefully reduced to one “theme.”
Now, not every IP can support multiple lands like Potter, SW, and Marvel, but a lot of strong Disney franchises are currently underserved in Orlando - Lion King, Aladdin, Moana, Beauty, etc. all have some presence but could support much more.