A little bit late on this, but I just read confirmation that Ed Benes will indeed be Batgirl's new regular artist, starting in September. As stated simply enough on Benes' website:
"IT'S OFFICIAL: ED BENES IS THE NEW REGULAR ARTIST ON BATGIRL!!"So, that's two out of four Bat book art changes that have been confirmed as regular changes. Catwoman and Red Hood remain up in the air.
This is the one I had the best feeling on being permanent, seeing that Benes was the only one who made the switch to interiors, and did the cover, as well as his past working history with Gail Simone. I welcome this change, I've always liked Benes (although, I will say his style has seemed to change a bit since last I read him on Birds) and look forward to he and Gail Simone working together again.
Now the only question is, will Ardian Syaf land anywhere? I hear Detective has an opening.
(Source: Ed Benes' Official Website)