I'm talking about issue #43 of Scott Snyder and Greg Capullo's excellent run on Batman. The current storyline began in the aftermath of an epic confrontation with Batman and The Joker, resulting in the apparent death of Batman. Gotham City has decided that it can't be without the Caped Crusader though, so Commissioner Gordon now patrols the streets as a new armored Batman. Oh, and it turns out that Bruce Wayne is very much alive, and he's doing charity work. The most recent issue reveals why he hasn't returned in his role as the city's resident superhero.
MILD SPOILERS AHEAD.
It turns out that he did die, only to be brought back to life (don't worry about the process). As his brain was healed, the pathways didn't come back together in entirely the same way. All of the details are explained in a conversation between Wayne's trusty butler, Alfred, and Clark Kent (yeah - Superman). Clark points out that it's not "really" Bruce anymore, as his brain isn't entirely the same. One tangible result was that he no longer remembered his life as Batman. Of course, Alfred informed him about his past and his motivation for being a hero - the murder of his parents.
I've heard religious apologists go on about how meaningless life must be if all we are is determined by the physical and chemical processes of the brain. All this tells us though is what they think, not what's real or not. Because what if that is what makes us who we are? Are we going to just completely give up and become nihilists because we're the product of a natural and physical process? I don't think so.
So, is Bruce Wayne still the same person when he's no longer motivated by what drove him his entire life? He's similar in many ways, but is it really him? If you remove the parts of my brain that make me love my family, get excited about comic books, want to write in my blog - is that still me? I'm not sure how much can change and have me still be me, but I know that if you change enough, eventually we can no longer say that we're dealing with the same Lance Christian Johnson.