Could have been so much cooler
look, i know this is a disney film and everything, but there is so much potential for a much darker sci-fi theme going on in the film.
the fake sky, the organs and stuff on the spaceship, the disintergrator rays (which turn out to be a teleporter, bah!) the map with the planets crossed off, those aliens arn't nice guys! (until they get all sanitised at the end)
plus with the talking animals, you could have an a plot about all the creatures on earth being lifted to sentience by these aliens for some nefarious reason on a pseudo earth.
"We were somewhere around barstow, when the drugs began to kick in"