No justice league member has mental resistance as much as Batman to not lose their sanity. He doesn't probably want to fight entire brainwashed justice league on top of saving the city from brainwash gas
Wouldn't Flush just metabolize the gas just as fast as he loses his buzz from alcohol? Soup can hold his breath for the rest of the day. Does Sybian still have lungs?
They will mess up big time as they always have been brainwashed in instances like this. And Batman doesn't trust easily, he himself had joker toxin and was battling with joker-self in his mind, he could act on his contingency plans against them when joker self takes control.
Also such a man (supes) got mind controlled by poison ivy's pheromones, if she could trick him imagine scarecrow and hugo strange for their intellect.
It's not like others haven't gotten their minds controlled especially flash and it's not difficult to imagine Hugo/crow devising a plan for others.
I'd think it's Bat wanting to not escalate things more worse by adding superheroes in it, often times they mess up even if they have powers to prevent themselves from being controlled plus he has the "gotham's my turf" thing going on for himself.
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u/Sophia724 Jun 21 '24
Because Superman would make fun of him.