Weiss has worked on DC Comics' alternate universe series Elseworlds, co-writing and pencilling the Batman graphic novel The Blue, the Grey and the Bat as well as Paradox Press' The Big Book Of series, doing many pages on a variety of historical topics.
Weiss has collaborated with DC Comics' Elseworlds series, producing work for the Batman graphic novel The Blue, the Grey and the Bat and contributing to Paradox Press' The Big Book Of series on various historical topics.