In a sense this movie is the OPPOSITE of......
Monsters vs Aliens, Monsters inc, and Hotel Transylvania.
This movie is the opposite of the 3 above mentioned movies because monsters are supposed to be evil, terrifying and lethal but in those movies they were cute, funny, heroic, and heart warming, opposite characteristics of what monsters are supposed to be.
Well this movie took people who are supposed to be morally pure, holy, loving, caring etc and made them out to be horrific monsters. I did not even realize nuns could be evil before!