Mulan sequel makes perfect sense
The original screenwriters and the story for Mulan had enough material for 3 movies. Mulan was the first animated movie to be completly done in the Florida Disney Studios at MGM. A Trilogy movie is a bit ambitious for their first movie.
Anyhow, no one expects an extravagant, wonderful Animated Feature since it is as a friend calls it, a "cheapquel". The Disney company has been laying off animators and closing animation studios around the world all year, animators have retired, and society has influenced their thinking, so they aren't exactly what they were before.. I think they hand the job over to the television animation studios to create. (yes, it was these studios that made all those other sequels, including Beauty and the Beast: the Enchanted Christmas, Return to Neverland, Jungle Book II, all which were beautifully done)
To all those who absolutely hate sequels and how Disney does things:
Who cares if Disney "ruins" books and movies by making books into movies and sequels? It's their way of telling the story and entertaining the movie watching community. As other people have said, young children, their main demographic, will want to and enjoy more of their favorite chacters which can only be done by sequels and television series (hey the Aladdin, Little Mermaid, Hercules, and Tarzan shows were great!). Isn't that what Disney is all about? Making children and families happy?