'Before Watchmen's Amanda Conner draws Silk Spectre - watch video
The Mega Con 2012 clip, posted by YouTube user aganej2, shows the Before Watchmen sketch being produced from the illustrator's point of view.
Conner was announced as artist on the four-issue Silk Spectre miniseries last month. Darwyn Cooke will serve as writer on the title.
Before Watchmen also comprises six other miniseries set before the events of Alan Moore and Dave Gibbons's original graphic novel. Moore hit out at DC Comics' decision to commission the project, while Gibbons has offered his blessing.
Brian Azzarello, Lee Bermejo, JG Jones and J Michael Straczynski are among the other creators on board for the prequel project.
Before Watchmen debuts this summer.
Move through a gallery of Before Watchmen cover illustrations below:
Copyright: DC Comics