I haven't looked; does Bob's Red Mill pancake and waffle mix have any corn in it? I believe that the Namaste mix is corn free but I don't know about the BRM. Some places have one or the other while others have both.
If you want Mickey waffles then Crystal Palace is out. They serve Van's frozen waffles last I heard.
We've had great experiences at 'Ohana (Mickey, Pluto, Stitch & Lilo), Cape May Cafe (Minnie, Goofy & Pluto) & Tusker House (Mickey, Donald, Daisy & Goofy). Lots of people also like Chef Mickey (Fab 5) but we haven't tried them for breakfast. Personally, I'd just go with whichever fit my schedule best based on its location.
FYI: If your purpose is just to get Mickey waffles, most resort CS locations can also make them.