Characters like the Shredder and he Rat King have gimmicks that wouldn’t feel out of place in the WWE or AEW, so the two blend together rather naturally.

Source: https://screenrant.com/aew-tmnt-danhausen-brody-pro-wrestling-variant/

Messages self-destruct, with a configurable timer and a Shredder feature that securely erases attached files, photos, and other data.

Source: https://www.digitaltrends.com/mobile/best-text-messaging-apps/

Oroku Saki, better known as the Shredder, became the Laughing Man, aka Giggles, after merging with none other than the Joker himself.

Source: https://www.cbr.com/batman-tmnt-crossover-deadly-villains-dc-idw/

’s Jeff Rowe talks keeping Shredder back for the sequel.

Source: https://gizmodo.com/disney-plus-2024-release-dates-marvel-star-wars-stream-1851112963

So it’s no surprise that the post-credits scene seems to set up Shredder as the main antagonist in the sequel.

Source: https://www.themarysue.com/teenage-mutant-ninja-turtles-mutant-mayhem-post-credits-scene-explodes-with-turtle-power/

Teenage Mutant Ninja Turtles: Mutant Mayhem teased the rise of Shredder in the mid-credits scene, and the villain’s introduction helps avoid past franchise mistakes.

Source: https://screenrant.com/tmnt-mutant-mayhem-shredder-avoid-franchise-mistakes/

This event is known as and while the Turtles have assembled their allies - which shockingly includes the Shredder and the Foot Clan - so, too, has the Rat King.

Source: https://screenrant.com/tmnt-finally-kills-krang-classic-90s-villain-permanently/