You ever wonder how much the Justice League + associates end up having to trade cases when it's not their world?
Like a magic user is hunting something that glowed and killed people strangely, but then they come across their spaceship and go "fuck, it's an alien. Ok call a Green Lantern and let them deal with it"
Or you find something from the wrong pantheon so your relics won't work. You're tracking what seems to be a regular human gang but nope! They've hired a wizard, so you put in a call to Justice League Dark and hope they're not too busy traipsing through Hell for the 3rd time this month. You're an overpowered alien hero and you figure out the guy you're after is actually just a regular criminal so you should probably leave it to one of the human heroes since otherwise they'll accuse you of going too hard on them in the trial.
And just the Watchtower phone room is like one of those old call centres where you're sliding back and forth on wheely chairs connecting up people who need to swap cases
