Could you do a Hal/Barry prompt? Maybe about the first time they met and their thoughts about one another?
"I could probably fly faster." Barry doesn’t say anything at first, only squinting his eyes at the Green Lantern.
"I don’t think so." He eventually states, though he’s unsure if he was understood or not.
"We could always race." Hal replies, as though it was obvious.
"I am a grown man, I am not going to ra- hey, is that Batman?!” Hal barely looks over to where Flash is pointing before he feels the wind whip around him, and knows, just knows, that Barry hadn’t seen Batman because Batman is an urban legend and goddamnit he’s already got a head start.
~
"Is that seriously how the two of you met?"
There’s a unified “yes” from the pair, and Batman only looks at them for a second longer before turning back to the computer system in the head quarters.
"So why did you think I was an urban legend?"
"…Uh."
It doesn’t take a detective to figure out what - or who - has just created the draft in the space station.