Well changing Fievel to Spongebob looks logical, and I can see the garden villas area get rethemed to a brand new E.T. queue, which means lots of changes with entering the show building. After that, I like retheming Animal Actors to 90's Nick Game Shows. It can be an outdoor Nick Studios! I like the Krusty Krab as well, even though Richter's isn't bad, and hopefully it will be an improvement from the pizza stand. I heard the pizza tasted like cardboard. And then they should demolish Barney, and create a walkway to a brand new area where the empty backstage area is.
However....... I heard rumors that Universal could get DC comics, and if that's the case they should also inquire about the Looney Tunes. And if Universal can get the Looney Tunes, THEN they can retheme the entire area to Looney Tunes, and create the Road Runner, Wile E. Coyote roller coaster that was once mentioned in the original IOA plans.