The Mystery Men originated as the team name of misfit Super Heroes led by "The Flaming Carrot." "Flaming Carrot Comics," by Bob Burden, was originally published by Aardvark-Vanaheim, then by Renegade Press and Dark Horse Comics between 1984 and 1993. The book has since relaunched in 2005 with Image Comics.
From the official Mysterymen website:
"...all you really need is a snappy costume and a cool name for the Mysterymen, the human cannon fodder of the war on crime. At their peak, they numbered about 30 (The Dirty Thirty) but it's hard to come up with an exact figure on them because of high casualty rates, the highest of any superhero team in the history of the medium."
Original comic book members:
Flaming Carrot, The Shoveler, Jackpot, Mr.Furious, Screwball, Captain Attack, Bondo Man, Jumpin' Jehosaphat, Red Rover, The Strangler, The Spleen, the Metro Marauder, Hummer, Disc Man, Jumo the Magnificent, the Whisperer, Mystic Hand, Star Shark, the Zeke.
Members invented for the movie:
The Bowler, the Blue Raja, the Sphinx, Invisible Boy
In the comics, the Mysterymen have also teamed up with the Teenage Mutant Ninja Turtles - twice.
For more information, here's the official website for Flaming Carrot Comics: http://www.flamingcarrot.com/FlamingCarrotPage/index.html
Wikipedia Entry can be found here: http://en.wikipedia.org/wiki/Flaming_Carrot_Comics