There's a whole stretch of WORLD'S FINEST covers, mostly by Win Mortimer, showing Superman, Batman and Robin together, even though they're not in the same stories inside.
It seems like it'd be fun to tell the unseen stories behind each cover...
The #31 cover can go so many ways. Are they unlicensed (perhaps dangerous?) figures? Are they official merch? Are the heroes happy or upset? I think there was a Superman Animated episode where Toyman sold Superman action figures programmed to steal... so many options.
Spoiler alert for the fourth cover: They're dressed up as each other. Superman is dressed as Robin. Robin is dressed as Batman, and Batman is dressed as Superman.
(Superman is contracting his muscles so tight that he shrinks)
First issue: Superman rips a train apart to distract everyone from Batman and Robin kidnapping a woman.
Second issue: The Trinamic Trio save Hitler from a flood.
Still working on the others…
I'd buy it. I've also always wanted to do a Superman set in a universe where Action Comics covers were unironically the story. (& consider, the covers were what most saw)
It seems the universe implied by SA DC covers is so much more insane and the superheroes so much weirder or even menacing