This is quite cool - a page from Denny O'Neill and Dick Giordano's 1989 retelling of Batman's origin, "The Man Who Falls."
It's a decent story which was published exclusively in the trade, "Secret Origins" alongside a bunch of reprints. Apparently it was used as a reference by David Goyer and Christopher Nolan for Batman Begins.
Anyway, that's not why I scanned in the page. I wanted to draw your attention to this panel...
That's Thomas Wayne rescuing young Bruce from a cave full of bats. It could be accidental, but I think Thomas looks like Joker here.
Purple coat. Green hair. No?
Scans from The Man Who Falls, by Denny O'Neill and Dick Giordano, colours by Tom McCraw. 1989