It is maybe worth noting that TMNT started as an indie comic making fun of superheroes. Think about it, superhero turtles livin in the sewers... No particular point, I just think it's funny.
In Daredevil, Matt Murdoch pushes an old man out of the way of a truck that contains chemicals that blind him but give him superhuman abilities. He is then trained by his mentor Stick the fight against The Hand.
In TMNT, there is an incident that involves chemicals getting into a sewer that transforms the turtles as well as the rat that is with them. That rat is named Splinter, and he trains the turtles to fight against The Foot.
Also no particular point aside from my own amusement!
It came up in a fairly exemplary way once when there was a fashion photographer in a group I went drinking with. Nice bloke with some interesting stories. He mentioned a plan for an elaborate practical joke at a fashion show by showing some crudely made post-apocalyptic style collection. Anything "scandalous" would effectively just end up being good publicity.