Ever since
Powder posted Eastman and Laird's original Rocksteady and Bebop designs in another thread. I've been wondering what they would have been like if E&L had decided to just throw them into Mirage. I don't think they would have been "bumbling henchmen" to a Shredder that spends most of the series dead.
I know they wouldn't be the same kind of Mutants the Turtles are, since there's a rule about that. But, that doesn't stop anthropomorphic animal characters (Chote, Worm People, Fish people, Triceratons and other alien dinosaur races, The ancient civilization of Monkeys and Cats that Pai-Doth Noor is from, which could easily include Rhinos and Boars as well) from existing anyway.
My guess is that they would have showed up in only a couple of issues (perhaps as part of "Tales") and they would have been just troublesome thugs with no connection to the Foot. They could overwhelm the Turtles with their Strength until the Turtles outsmart them.
But, what do you think?