Well, as for originality, you certainly nailed it!
Honestly, I never thought I would see concepts like this being incorporated into Disney princesses, and it's a fascinating concept to do and look at. Now, the legs are one of the problems here. They are too thick. If her knees were bent that way we wouldn't see that much of the backside of her leg. And, the lineart for the hands is a bit sloppy. I really like the expression she has, it's really cute and really great! Pascal is a funny addition as well.
Overall, I like the piece. The legs are the only anatomy problem and the lineart in some places looks messy. other than that, it's a great piece and a great crossover!