Is it because they're afraid of looking like hypocrites over the Kimba the White Lion/Lion King or Secrets of the Blue Water/Atlantis: The Lost Empire controversy (look it up)? In those cases, those are just bizarre co-incidences (sort of like the movie Ghostbusters not knowing of the live action 70's series The Ghost Busters, and causing 2 cartoons in the 1980's)... but this is willfully trying to steal a movie in theaters and profiting from someone else's copyright. Plus, I think it would be a boon to mankind if Disney shut these lousy little animation studios that make horrible movies that nearsighted old people buy for their Grandkids.
It's just as bad as that illegal "Chicken Little" sticker sets I saw called "Sea Life" I swear I'll buy them and post them here someday.