One time only, Bill did get to see his name prominently displayed on a Batman story—but it was not in print. Bill was the only writer of Batman comics who (with Charles Sinclair) also wrote an episode of the 1966 TV show that made Batman’s popularity go mainstream.
Small screen was big time on one level, but in the grand scheme, small solace for a marginalized career.
Speaking of TV credits, here is what the credits for the landmark Batman: The Animated Series could’ve looked like if things had played out differently…fairly:
courtesy of @hrguerra
Note the order.