This is the cover of the August 2010 issue 700 of Batman comic.
This special issue contains an excellent story "Time and The Batman" written by Grant Morrison.
The story involves Batman of the past, Bruce Wayne, Batman of the present, Dick Grayson, and Batman of the future, Damian Wayne, Bruce Wayne's son. For those who are not aware, Batman (Bruce Wayne) was killed in the final chapter of DC universe earth shaking story arc, Final Crisis. Dick Grayson, the first Robin and latter Nightwing has taken over the mantle of his mentor, Bruce Wayne.