The acclaimed scribe, who co-created the original Watchmen series with artist Dave Gibbons, described the prequels as "completely shameless".
He told The New York Times: "I tend to take this latest development as a kind of eager confirmation that they are still apparently dependent on ideas that I had 25 years ago."
DC confirmed Before Watchmen earlier today following months of speculation. Details of the seven inter-connected miniseries and their creative teams are as follows:
Rorschach (4 issues) - Writer: Brian Azzarello. Artist: Lee Bermejo
Minutemen (6 issues) - Writer/Artist: Darwyn Cooke
Comedian (6 issues) - Writer: Brian Azzarello. Artist: JG Jones
Dr. Manhattan (4 issues) - Writer: J Michael Straczynski. Artist: Adam Hughes
Nite Owl (4 issues) - Writer: J Michael Straczynski. Artists: Andy and Joe Kubert
Ozymandias (6 issues) - Writer: Len Wein. Artist: Jae Lee
Silk Spectre (4 issues) - Writer: Darwyn Cooke. Artist: Amanda Conner
> Watchmen writer Alan Moore: 'I don't have a copy in my house'
Gibbons gave his blessing to the venture, claiming to "appreciate DC's reasons for [the] initiative".
J. Michael Straczynski, writer on Dr Manhattan and Nite Owl, spoke out in support of DC's decision to commission Before Watchmen in an interview with The Hollywood Reporter.
"Ever since Dan DiDio was handed the reins (along with Jim Lee) over at DC, he's been making bold, innovative moves that might have scared the hell out of anyone else," he said.
"At a time in the industry when big events tend to be 'OK, we had Team A fight Team B last year, so this year we're gonna have Team B fight Team C!' Dan has chosen to revitalise lines, reinvent worlds and come at Watchmen head-on.
"It was, I think, about two years ago that he first mentioned that he was considering the idea, and he's to be commended for fighting to make this happen."
Reaction from across the comic industry has otherwise been mixed. Artist Joe Bennett, a fan-favourite Hawkman illustrator, told Digital Spy that he would have turned down the opportunity to work on the project.
"If DC had invited me to do any of these books I would have refused," he said. "I really won't mess with a great sorcerer."
Before Watchmen will launch this summer.