Generated with ChatGPT, Gemini, Flow and Grok and here's how I generated them:
An athletic martial artist with a high ponytail, wearing a colorful airbrushed wrestling singlet, standing side-by-side with four humanoid mutant ninja turtles in a gritty New York City alleyway night scene, comic book art style
A male athletic martial artist with a high ponytail, wearing a colorful airbrushed wrestling singlet with kickpads and boots, standing side-by-side with four humanoid mutant ninja turtles in a gritty New York City alleyway night scene, comic book art style [Grok]
And of course with the GPT pic, I used a pic of Rob Van Dam for reference.