If they didn't try it twice before with 2 sequels with, let's face it, goofy plots. Everyone has been clamoring for a Roger Rabbit sequel. It's going to be another situation where everyone wants it, but no one likes it, sure... but I'd rather they make a sequel that does nothing to the original movie unless you let it than yet another sequel to a crappy current movie that should just disappear because no one really liked it.
Besides. It means that Disney is playing Ball with Amblin and Spielberg again instead of letting an angry, Eisner induced, feud keep the character in permanent mothballs. He could be all over Disney World again. I don't see that as a bad thing at all.