I don't think people will hate on you for that. It could be too soon for the Joker. It wouldn't be an issue if the last Joker was forgettable, but it was the role of a lifetime, so no doubt everyone involved is really trepid about bringing him back.
Maybe he can be teased, like Batman has had dealings with him before, but that will have to be put on hold whilst Batman deals with this new threat with Superman. We wouldn't have to see this new Joker (this film will have enough recastings for any audience to handle) but they can get used to the idea of this new Joker being somewhere out there.