We havent even seen The Flash costume or Supergirls costume (officially) so it'll probably be a hot minute until we see the official Batgirl suit. But with paps, we'll likely get a glimpse of it in 3 months time.
I want Dick and Dinah. DD me!
As far as theater? I wont lie....I think WB is still very weary of female lead superhero films and feel safer with it on HBO Max.