In a lot of stories I think up, Axel from Kingdom Hearts may actually be an older Axel Manning. Here's how the story would go:
The Heartless attacked Landmark City, completely destroying it. Axel and Shark were the only survivers. In the wake of the destruction, Saix appearse and reveals that Axel is a Nobody and that his other knew Saix's other.
If that's not a good story, then I don't know what it.