Arrow and DC's Legends of Tomorrow executive producer Marc Guggenheim is teaming with ComicBook.com to give fans an opportunity to snag a one-of-a-kind piece of memorabilia, with the money going to a worthy cause.
(The script for the Supergirl episode "Medusa" is not included, as it was a prelude to Invasion! and not part of the crossover proper.)
The scriptbook was created at Guggenheim's request, and while we don't know the total print run of the books, the answer is "very small." And only one of them -- the one being auctioned off -- is signed by Guggenheim and six other Arrowverse producers/writers.
The signatures -- done in silver Sharpie on the cover -- include Guggenheim, Arrow EP Wendy Mericle, The Flash's Aaron and Todd Helbing, Legends of Tomorrow's Phil Klemmer, and Greg Berlanti and Andrew Kreisberg, who work with all of the shows.
The highly-rated crossover's story centered on an invasion from an alien race called The Dominators -- and the story was loosely based on a 1988 DC Comics crossover written by Keith Giffen and Bill Mantlo.
100% of proceeds from the auction will go to benefit the family of Bill Mantlo, who was injured in a hit-and-run accident in 1992 and has been living in institutional care ever since. Since comic book professionals -- especially at the time Mantlo was at his peak -- earn little or nothing in the way of benefits, the brunt of the medical expenses falls on his family. His brother Michael has set up the Bill Mantlo Support Fund, to which all of the money raised by this sale and others like it will be donated.
Michael Mantlo is aware of this auction and is supportive of Guggenheim's and ComicBook.com's efforts to give a little back to his brother, who was a titan in his field.
Mantlo, best known for co-creating Rocket Raccoon, made headlines when Guardians of the Galaxy came out because his brother Michael and filmmaker James Gunn worked with Disney to bring an early copy of the film to the institution where Mantlo lives, so that he could see Rocket's big-screen debut early.
Cards, letters or donations to Bill Mantlo can be sent to: Mike Mantlo 26364 East Pintail Road Long Neck, DE 19966 Please make out any checks to Michael Mantlo, who is Bill's legal guardian.
NEXT: The Flash, Arrow, Supergirl, Legends of Tomorrow Crossover Trailer / First Look At The Dominators / Invasion! Crossover Promo Photos / Potential The Flash Spoiler Spotted On Set / Will Joe West Die During The Invasion! Crossover?
Supergirl airs Mondays at 8 p.m. ET/PT; The Flash on Tuesdays at the same time; Arrowon Wednesdays and DC's Legends of Tomorrow on Thursdays. All four series air on The CW. The "Invasion!" crossover will air beginning January 9.