When I saw the title, I was all, "Saison!" But not everyone likes Belgian styles. I've done a blueberry wheat, and everyone liked it. I thought the flavor extract (I think it was "natural flavor," but that doesn't mean it comes from blueberries) tasted a little artificial.
Last year, I did 50/50 wheat and pilsner extract batch with Meridian hops at 60/30/0 minutes, and a grapefruit (peeled, tore up the rind, chopped up the pulp) thrown in at the end. That was really good - didn't taste like a fruit beer or a shandy, just a hint of something different.
I did that to make it easy for myself, but if you're doing grain, just make it 50/50 wheat and pilsner. Wheat extract is like 60/40 wheat/barley, so that's more like 30% wheat. I will probably do that again this year. I might try it with some other fruit, like tangerine just to mix it up.