Between 1995 and 1997 Kevin Eastman created concept art for a fourth live-action
Teenage Mutant Ninja Turtles movie that was never filmed, which was tentatively titled, "TMNT: The Next Mutation." Below you can find many images of Kirby, the "fifth turtle," but also featured are Fang, Shredder, Spyder, Nano Spyder, Super Shredder, Kasey (Casey), Talbot, Lawson, Bugman, and Evil April.
In May, Kevin Eastman, co-creator of
TMNT (the other being Peter Laird), put the concept art up for auction.
"The fourth live-action TMNT film was pitched and originally scripted as a grittier, less kid-friendly adventure, and to that end Kevin Eastman designed a more brutish, hardcore fifth Turtle, named for the legendary King of Comics (Jack Kirby)." - Heritage Auctions
CLICK ON IMAGES TO ENLARGE