I don’t usually go for the Disney Princesses as ____ type stuff, but I thought these pieces by Phill Berry were pretty well done:

Jedi Belle and Fuzzy Alien Beast
Jedi Jasmine and Alien Rajah
Jedi Rapunzel with techno-hair and alien frog companion
Jedi Cyborg-Ariel and Robot Flounder

I want to cosplay as Jedi Belle.