The Mutant Leader don't shiv... he balls nasty!
Gotham has introduced incarnations of pretty much every major Batman villain there is over the course of four seasons, and it looks like the show will turn to a classic tale from Frank Miller for its fifth and final run.
In The Dark Knight Returns, The Caped Crusader faces-off against one of his most powerful foes in the Mutant Leader, and the set photos below would seem to confirm that this ferocious villain - or at least a character inspired by him - will make his debut during season 5.
If this is indeed The Mutant Leader, it stands to reason that Gordon, Bruce and co. are also going to have to contend with his delinquent gang when Gotham returns to our screens next year.