The main character is a boy with brown hair who lives in a normal land. The theme of this movie I believe has to deal with dreams and nightmares. As the movie goes on he enters a somewhat fantasy land. Near the ends he goes to a disturbing place where there is either many or one monster(s) that are created from a black, gukky substance. I think there are some type of bats in this evil place as well. The boy exits this "underworld" either aware or unconsciously. The final scene of the movie involves him sharing a kiss with a girl, maybe while on some sort of hot-air balloon.
This movie may or may not be a disney movie. It doesn't fallow the cliquey standards of a classic disney movie, its kind of a fantasy movie. Also, the overall sense of this movie is meaningful and kind of epic, it probably has a meaningful name.

Little Nemo: Adventures in Slumberland (1989) (http://www.imdb.com/title/tt0104740/)