Those look kinda like Wild Turkey eggs to me... have you seen any Wild Turkeys in your area? Or even free ranging domestic Turkeys? I vote yes, incubate them and go back and salt/bait that nest with some brown eggs of some kind so you get whatever's laying there to lay more for you, lol (if you didn't destroy the nest that is).
Here are 3 Wild Turkey that eggs my TurkeyGirl recently laid (the 3 on top, the other 2 are good sized Guinea eggs, for comparison). She's laid 4 eggs total so far, but I popped one in the incubator just to see if by chance one of the Guinea boys has been getting frisky with her, lol. She needs a boyfriend...
I think you're right about the wild turkey. We do have them in the area, though I haven't seen them on the property recently. I didn't break up the nest, just stole some eggs out. I'll go back to get new eggs today, so I'll find out if it's still laying there or not. I'm not sure if it laid in the guinea nest, or the guineas laid in it's nest! LOL I don't really want turkeys so I probably wont incubate them. If I thought it was something else I probably would though!