You know, Superman has filled in for batman a few times dressing up like him and people rarely tell the difference. But what if filling in and wearing batman's costume was just required.
So like on the times superman cant cover, and neither can any of the robins, the justice league spins a wheel to decide who goes and pretend to be batman.
Now in some cases, no one really can tell. Like when Hal takes over. His brown hair is covered by the cowl, he looks a bit leaner but Hal uses the ring to look a bit more buff.
Depending on when Arthur is growing out the beard or not, he usually pulls it off well, but he hates wearing the costume, and the water ways in Gotham are disgusting.
People can often figure it out when other member of the justice league fill in and will call it out when they figure it out.
Except wonder woman.
Not because she looks like batman, its just people immediately KNOW its wonder woman but no one has the guts to call out wonder woman, and all of the rogue's gallery just go along with it for fear wonder woman will straight up kill their asses.
Martian Manhunter is the best impersonator because he can shapeshift and read minds, so he often knows how the villains perceive Batman and acts accordingly. Only one villain can actually tell when this happens
The rogue's gallery of Batman have actually have preferences on which league member they prefer to Batman.
Poison Ivy prefers when Superman takes over, she often has enough knowledge to get her plants to work on him, and usually a touch of kryptonite works. HATES when Wonder woman or Flash takes over. (Wonder woman will just speed blitz her, and Flash keeps avoiding her spores and will easily get punching.)
Two Face prefers Wonder Woman, mainly because she is the most straightforward and he appreciates the honestly. Hates dealing with Superman (too goody goody) and Green Arrow, (he never lets him flip the coin, its annoying he shoots the coin EVERY TIME!) Mr.Freeze prefers Flash, mainly because he has studied other cold villains and sees how snart/Captain Cold deals with Flash and has the cold strats on lock. He HATES when Superman or Green Lanturn take over. (Hal's powers are hard to deal with, and Superman has heat vision)
Penguin Prefers Green arrow, as he finds that green arrow is similar enough to batman that its at least predictable.
Killer Croc prefers Aquaman, as he has someone he can complain to about the sewer system in gotham, Or wonder woman, because he thinks she's hot. He hates dealing with Superman as he cant really do much.
Bane prefers Green arrow, and while he dislikes fighting superman, HE HATES the flash even more. He cant even touch him and flash can out think him.
Clayface prefers fighting Flash and Wonder woman, as his clay makes it harder for them to deal with him, while Green arrow and super man are the worst as they can deal with him long range.
Joker, hates all the non-batman and is the only one capable of clocking each league member when they pretend to be Batman. He can even tell when Martian Manhunter takes over for Batman. And when he finds out its a replacement, 9/10 times he just gets up and leaves its not fun if its not batman, UNLESS he thinks of a funny bit involving the Batfakes
Though most of the time, when a bat replacement shows up, most of the rogues just wait it out until the real Batman shows up again, they like their routine
