It's animated fairy tale. Something to easily munch popcorn to. I'm into anime and cartoons, so I enjoy those smart enough for adults, like Croods or Shrek. Nimona is very well written, kinda like Up!, maybe more whacky and also bit more heavy.
Discussion
My wife has a bias against animated movies, but she loves Up! and other select few. This will make it easier to sell her on it.