Okay, maybe you all know about this but I just came across this today and had never heard of it before. Apparently this is the original end to the live action Teenage Mutant Ninja Turtles movie. It’s so different!
And as long as I’m linking to rare TMNT stuff, here’s something not many people saw. TMNT made two anime episodes that spun off from the original cartoon. It was called Mutant Turtles: Superman Legend. It was created in Japan to sell the Takara toyline of ninja turtles as superheroes (they were also sold here in the U.S.) and had the same Japanese voice cast that dubbed the original cartoon. In it, the turtles gain a new ability to power up into superheroes for three minutes at a time. Not making it up. You can watch the first part below and the same YouTube user has all the other parts.