I was just talking to my son about this last night. After really enjoying the hand-drawn Princess and the frog, and knowing how Lasseter recognizes the value of the old style as well as the new (cgi) style.
Sure would be nice to see Mickey, Goofy, Minnie, Pluto, Donald, Chip and Dale assembled into a full-length (hand drawn) feature movie in the modern day. I realise they would use (most likely) cgi backgrounds like in The Princess and the frog. That would be ok. But the warmth and beauty of a good ol' hand-drawn animation is so great. So worth it.
So Disney, if you are reading this... get busy. I expect something by 2013, 2014 at the very latest!!