Source: wfcomicsblog.blogspot.com
7. Superman and Batman – Brothers
(World’s Finest Comics #172)
This is, strangely enough, the most Elseworlds-y premise of anything on this list.
In it, Jonathan and Martha Kent adopt newly orphaned Bruce Wayne, and he and Clark Kent become brothers. But, as they’re growing up, Clark realizes that Bruce is kind of a weirdo. And that he seems really super obsessed with crime. So after Clark foils a bank robbery in which the criminals are using TANKS, he notices that Bruce is really interested in the robbers.
Also, can we acknowledge that it was a TANK BANK ROBBERY? The street crime in Metropolis is craaaazy.
One night, Bruce comes home in a Bat outfit, and Clark thinks his brother has become a criminal. Bruce trips and accidentally opens Clark’s closet full of Superboy Robots, which honestly feels like it should be locked or something, and discovers that Clark is Superboy. Clark attacks Bruce, but Bruce reveals that he’s actually a crime fighter, not a criminal. So the duo teams up as Superboy and Batboy. And then they grow up, and Batman goes to fight people in the future with the Legion.
