Board Thread:Supergirl discussions/@comment-27700324-20180619050909/@comment-28109177-20180621210358

If Powergirl were to be introduced, she'd have to be from another earth as she is Kara's Earth 2 doppelganger. So this Dark Kara isn't Powergirl, can't be. And the boob window wouldn't be a problem, they could some slight designs here and there and still make it look awesome.

I don't know if they are introducing her this season, maybe the next arrowverse crossover after the Batwoman crossover she can be introduced.