system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel/DC] Do characters in-universe ever play who-would-win?

Have we ever seen heroes or villains talking out who-would-win types of scenarios among each other? If so, is there anyone over at Marvel who tends to get the "with prep time" qualifier that often gets attached to Batman?
gpt
Superman himself is once asked by a girl he's saved who would win in a fight between himself & Batman.

After she dismisses his first answer of the Joker he tells her Batman would win. When she asks why he admits he'd let Batman win since "if you knew Batman, you'd know, it'd mean a lot to him".

And there's always the Flash & Superman races that the two hold for charity sometimes.