Source: dc.wikia.com

8. Superman: Speeding Bullets

“…were Superman?”

Again, Speeding Bullets is a clever idea, and it’s decently executed.  Baby Kal-El's rocket is found by Thomas and Martha Wayne, who decide to take in the baby and name him Bruce (even though this doesn't really match up with the timeline of those characters but whatever).

When Thomas and Martha are murdered, Bruce incinerates the mugger and goes into a shame spiral that eventually leads him to his role as the Dark Knight. Of course, he's working as a pretty darn brutal Batman. Speeding Bullets also turns Lex Luthor into the Joker because that is a thing that I guess you could do if you wanted to.

The story ends with Bruce outgrowing his dark broody teenage angst Batman phase, and becoming the heroically positive Superman.