Yeah that was so odd but as a child I didn't seem to notice. I love Aladdin. Aladdin and return of Jafar are two of my favorite Disney movie. Still have both of those on video tape. Though nothing top The Rescuer down under for me.
Are you a fan of the Disney Channel movies? If so, a High School Musical house could be cool. You could have Troy and Gabriella as the characters, and then the different rooms in the houses matching various scenes from the movie. You could replace this with any Disney Channel movies or shows you're a fan of - a hotel for the Tipton from the Suite Life of Zack and Cody, dressing rooms and a stage to represent Sonny with a Chance.. lots of material here to draw from!
I also love the idea of a Star Wars house, there are so many planets to draw inspiration from! Since you have a Marvel house, I think a Star Wars house would fit nicely with that.
Kingdom Hearts? The character could be Aqua and the house can be used for different themes that reference other Disney properties you don't have a main house for, like Toy story, Winnie the Pooh, Mickey Mouse etc. The main room can be Kingdom Hearts theme while the other 5 can be used for other properties of your choosing.