I recently stumbled across a flash fiction contest focused on alternate history, and decided I'd take a stab at it. My initial idea was for a German invasion of the U.S.' East Coast following a very different World War 2. However, the more I've thought about it, the more it feels like the premise is worn out. "Axis wins/Axis conquers the world" is probably the most common sort of alternate history fiction I've stumbled across, followed by "CSA wins the American Civil War". Considering that, I wouldn't be surprised for this contest to get swamped with alt-WW2 scenarios, and the last thing I want is for my story to just blend into the crowd. So I'm curious: what sort of alternate scenarios do you find to be way, way overdone? On a side note, I'm leaning towards doing a "Carthage defeats Rome in the Second Punic War" based story. Any advice on how to make that as plausible as possible is welcome.