At the same time Selina is in games (Injustice II, The Telltale Series), finally got some big focus in DC Super Hero Girls, is in a live-action TV show (Gotham) and is going to appear in Gotham by Gaslight next year.
Add the fact that she's the co-star of the current flagship book of DC comics, by sales alone, and I'd say that puts her a little above Kate (not that I think it should be a contest).
She hasn't been immediately relaunched yet, so I think that saves her from being the Bat-Captain Marvel .Kate's push definitely isn't working, but that doesn't mean it hasn't been happening in regards to her treatment. Still, despite giving her what they can, she isn't selling and I hope DC sees that and tries something else rather than making her Bat-Captain Marvel.
I think Babs needs a revamp, but I also think she'd probably need something else (like a bigger named writer) to draw more interest back to her book.Cass and Nu52Babs both regularly sold over 30,000 (at their best, both did well over that), but given how far Babs has fallen, her ongoing currently having the lowest sales of any Batgirl ongoing and not too far above what the Beechen Cass mini ended at, I think it's safe to say Babs's prior success was only due to the overall inflated sales of the Nu52, Simone's name, and then the initial draw of Burnside. Contrary to what some think, I don't think making Babs more serious would raise her sales at all, but simply just lose her even more readers, the ones who REALLY like Burnside.
If DC handled it right? I have no doubt .I don't know if Cass could still regularly pull over 30,000, but I do confidently believe she could outsell all the currently failing Bat books.
It would depend a lot on the writing and handling of it, in my opinion, because it would need to be just right for all the different Batgirls fans to accept it and enjoy it.See, I'm not sure Cass on her own could still regularly pull 30K, but I think this definitely could. And if done right, maybe, just MAYBE, the completely shattered base that is the Batgirl fandom could start being elmers glued back together.