Depending on your definition of 'canon'. This is Paladin, a Bruce Wayne from a fictional reality- well, fictional within the DC universe itself. Basic story is that instead of Zorro, Bruce was taken to a cowboy film by his parents That Night, and from there he adopted a rather different persona and approach.
I'm not that enthused about the rest of Duffie's JLA run so far, apart from the return of Dr Light, but Paladin was a rather nice idea.