I read a couple of books by John Maddox Roberts where the premise was that Hannibal had won, and the Romans went into exile. Then they came back.
It worked, I think, very well. Partly because it wasn't covering centuries of time. The victory of Carthage wasn't affecting modern Europe. In only a generation, the Carthaginian victory was going to be reversed. And partly because the author knew his stuff. That last bit is every bit as important for alternate history as it is for historical fiction.
Sounds like an interesting read. Thanks for the tip.