You would never believe how many toy concepts never get made. In the Toy world concepts can get really far and never happen or die right off the drawing board. Here is a long lost crossover that didn’t happen. Twitter user Alan Johnson provided some insight and images to what could have been. The long lost TMNT x Star Wars line.
Back in (I think) 1991, Kenner/Hasbro allowed the #StarWars toy license to lapse. Playmates made a pitch to get it, complete with Teenage Mutant Ninja Turtles crossover concepts by TMNT artist Michael Dooney. They didn’t get the license, but these are so cool!
Here are some versions of that Star Wars x TMNT concept art with detail callouts too.