Joker realises it's not Bruce Wayne as Batman (Excerpt from Detective Comics #673)
If someone has read this issue (I’ve never read any comics related to Batman), what is the premise here? Someone is pretending to be a Shredder + Batman doppelgänger?
If it's the storyline I'm thinking of, Batman had his back broken by Bane, and Azrael stepped up as Batman while he was out of commission
Yeah, it's from the Knightfall era/story.
I think it's Azrael
https://imgur.com/N2llGl5
Azbats. Is. So. Badass.