It's Jason Todd. I'm really positive on this one. Geoff Johns had an idea a couple years ago (pre-New 52) to write Jason Todd in as Earth 2's Batman. Obviously, Geoff isn't writing this, but I have a strong feeling that's what they're doing. This Batman is clearly more aggressive in his fighting style (he uses that little gun on his wrist), he wears red, and his Bat-logo is similar to the one Jason uses in Red Hood and the Outlaws.