They won't do a sequel, but they'll do a cartoon series. Hope there's toys. I LOVED that movie but the toys were impossible to find. I was only able to get like 2 of the McD's toys as it is. Though the show won't be the same without Steven Colbert as the President. They'd REALLY have to pay him a lot to keep him on.They're apparently doing a Monsters Vs Aliens series too.
You know, as far as movies that keep the cast when they become cartoons, that's a rare thing...
Depending on which series, Disney seemed to keep around SOME of the cast. Aladdin was only missing Robin Williams (he was angry at the management at the time because of something that happened about the merchandise anyway), Timon and Pumbaa's entire cast was recast, except for Jim Cummings as Ed and I think Robert was still Rafiki. Tarzan recast everyone, which is strange, since they recast Wayne Knight's character WHILE they had him as a semi-regular cast member of Buzz Lightyear of Star Command... and he was basically one of the only people in the movie to be on the show, and he did a different character. Emperor's New School had almost everyone by the time the show ended except for David Spade. John Goodman did the voice of Pacha in the second season. of course, that show wouldn't have been as funny, much like the movie, if it wasn't for Patrick Warburton and Eartha Kitt.
As for other movie based cartoons, that's even more rare. Spaceballs ONLY retained Mel Brooks (being executive producer and all) and Joan Rivers. of course, one of the cast members was dead, so... that goes without saying. Bill and Ted's Excellent Adventures kept the star cast... of course, back then Keanu wasn't as popular as he is now... the second season ONLY changed because they moved to Canada for the voice work. Ben Stein is the only one that reprised his character for The Mask series (though, Rob Paulsen had a LOT more fun in the role than Jim ever did). That's about it, though. Can't think of any others that retained any of the cast.