Curate, connect, and discover
Whenever Bruce can't do something as Batman he sends one of his kids in the cowl. Literally any of his kids. To deal with having to wear the cowl, they turn it into a game: will the justice league notice that Batman isn't the person under the mask?
Spoiler alert, they don't.
Somehow, the league never notices when it's not Bruce under the cowl, or at least that it's not the same person they all know.
Like never.
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Hal: Hey Bats, you look taller today.
Jason, determined not to lose: hm
Hal, sensing danger and immediately backtracking: uh, that's not to say you don't usually look tall, I mean you just look taller today, um did you change your ear thingies?
Jason: *Batglare intensifies*
Hal: uh, I'm just gonna go
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Aquaman: you've been quiet this whole meeting, Batman, even for you.
Cass, currently wearing shoulder pads and absolutely insane platform boots: *a fim huff of breath*
Aquaman: right sorry, I forgot you were dealing with another mass break out from Arkham this week, you don't need to stay for the whole meeting. We know you probably know everything already anyway
Cass: *nods*
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Flash: Morning Batman. *zooms past*
Duke, absolutely befuddled:
Duke, quietly into his comm: you'd think the speedster would have the time to notice
The several batkids on the other side of the line: *laughing hysterically.*
Dick, wheezing: just do the thing where B tucks the lower half of his face into his cape like he's Dracula. You're doing great.
Bruce, from somewhere in the cave, actively giving up on the assumption that his coworkers have at least one working braincell between them: stop comparing me to Dracula, Dick