Okay, so I'm sure she and Zatanna have MET at some point... but yeah. I've no idea how they get on! Probably fine. :) Zee's the friendly sort.
Aaaand, I'm thinking Magenta (and maybe some NPC Rogues?) will pop up at the JSA fight just cuz, y'know, they're in Missouri anyway... IDK just thought it might be fun. :D