The whole Jeremiah arc seemed like a way to give Monaghan his most deserved spot as The Joker without having to retcon the creative team’s earlier stance.
Technically, Danny Cannon’s answer to ComicBook.com is similar to what Gotham’s execs were saying about The Joker, specifically when talking about Cameron Monaghan’s Jerome, who was introduced back in Season 1.
The kind of madness that brings out the vigilante bat in others.
But apparently Gotham will continue adapting and corrupting the Clown Prince’s influence to the point where the madness completely eclipses that of Jerome’s.