In any case I was invited to contribute to these anthologies, which were various creators' takes on TMNT. However since I didn't really get the appeal of the Turtles at all (I never got the appeal of the lagte-'70s X-Men revival, either), I substituted my own group of snapper turtles led by a Jerry Lewis-like Nutty Professor mouse. The first story is noteworthy for introducing Pteranoman, my paleolithic take on Batman, who would soon thereafter get his own one-shot from Kitchen Sink, and later figure prominently in Bizarre Heroes.
It is also features some pretty nice cave babes which likewise prefigure The Phantom Jungle Girl, who also made her debut in Pteranoman #1. It also features some inside jokes, such as Proffy's catch-phrase from Larry Marder's Tales of the Beanworld. The "real" TMNT and their rat guru appear at the tail (no pun intended) end.
The second story appeared in color, and is a fairly generic pirate tale, with a very inside reference to Will Eisner and Wally Wood's Outer Space Spirit. It is noteworthy if only because I would later draw a "real" TMNT story for the Archie series featuring pirates.
The copyright status of this material, as far as I am concerned, somewhat unclear. I will have to check my archives, but I honestly don't believe I ever signed a work-for-hire contract, or indeed any contract, for these stories (although I was well paid for the time). As the writer-artist, the Teen Techno Turtle Trio, or Alternate Turtles, if you will, belong to me, and I would probably be free to reprint or collect them, although I would no doubt have to obtain permission to reproduce the panels in which TMNT and Splinter appear, and since the property is no longer controlled by Eastman and Laird, how I would go about that is unclear. More likely I would have to alter those panels in some way.
For some critical appraisal on the first and second story, see TMNT Entity blog.
The original artwork, in any case, remains in my possession, and as complete vintage stories, might be attractive to some collector.