Joker getting 11 nominations makes me feel more skeptical about the prospects of sequel-izing this movie. There's no getting around the fact that it's been received as a prestige film. A sequel risks both cheapening this film, and the more awards recognition Joker gets, it just increases the chances that a sequel would end up coming up short (or being perceived that way).
I'm open to the idea of seeing a totally different Joker origin story in another Phillips/Joaquin movie, but I just don't care to see any more of Arthur Fleck. And I can't shake the thought that simply walking away would probably be the best move for preserving this film's legacy.