I kind of mentioned this in another thread, but since this is related to the TV show I was thinking…
The opportunity may have passed by now, but at the moment in different shows the Arrowverse has had adaptions of Martian Manhunter, Steel, Vibe, Gypsy, Vixen and Elongated Man. That is over half of the Detroit Era justice League but unless I have forgotten something those characters have never all been on screen at the same time.
It may just be me but I think it would fun to write a reason for those specific heroes to team up together even if just briefly for a fight scene. Given Crisis is next year so think we might see some glimpses of alternate worlds maybe they could do a world where those heroes are the Justice League on their earth, or Justice Society if they can’t use the Justice Leagues name. Or something to that effect.
I just always had a soft spot for that team despite their many faults, and would get a kick seeing them adapted (at least as close as they could) by some kind of team-up.
Maybe it’s just me.