I like the piece, Supergirl taking point as she, Robin, and Blue Beetle face off against some of Alex's robots. The S-shield seems a little off, but I like Kara's pose as she braces for an attack. This could easily be the cover for the upcoming trade of this arc.
I only know Asrar's work from the Jeff Lemire Atom back-up feature in Adventure Comics but I can remember thinking he had a nice style.
Of course the new cover means that this initial cover solicit by Amy Reeder isn't going to be on the issue. I like this piece too. But the Asrar piece clearly is linked to the internal story while this Reeder piece could be on almost any issue or just be a pin-up.
Much like the other un-used Reeder cover for Supergirl #61, I hope this makes it into the trade in a cover gallery of sorts.