Are you going to a park? Main Street Bakery and Sunshine Seasons are good, I heard WPE has a nice breakfast and all the value and mods have great CS breakfasts, they are almost all the same
Last year we had 3 CS left on DDP the day of check-out from OKW and so before we got on the road back to Boston(with a stopover at HHI), we drove next door to POR and had a nice breakfast there. We waited until after the rush for those who were heading to the parks. There are alot of choices and we had a great breakfast for the road. Hot and fresh.
We had good experiences having breakfast at Coronado Springs. For a CS, you get a lot of bang for your buck in a nice atmosphere. But unless you have a car, it's not worth the trek for some eggs and bacon.
What about Downtown Disney? Earl and WPE both offer breakfast.
Capt. Cook's at the Poly for Tonga Toast! The other breakfast platters were good, too. If you would rather go to MK, I second Main St. Bakery. Loved their french toast loaf, not so much the giant cinnamon roll.