The wave breakfast is one of my favorite meals on property! I always do the buffet. It's basically just everything that's on the menu plus a few things so if I remember correctly last time that was:
Sweet potato pancakes
Whole wheat Mickey waffles
The freaking best biscuits and gravy known to man
The freaking best cheesy grits known to man
French toast bread pudding
Some omelette
Eggs
Bacon
Chicken sausage
Assorted pastries and breads(beware no Apple - the contemporary doesn't like apples lol)
Fresh made honey pecan butter (good for pancakes)
Smoked salmon
Fresh fruit and yogurt
Oatmeal
Fresh made granola
And I think I'm forgetting a few things.
I really enjoy it - plus for Disney it's relatively cheap, you usually don't need a reservation, and it's really quiet and the food tends to be a little bit different from standard offerings. I highly recommend it.