Just thought about this, even though I, Like you, am so over the Joker, this may tie-in with John's 3 Jokers. It is going to be hard to stay away from if that is the case.
The good news is that this sounds like it is just going to be the next step in Tynion's Batman plan and possibly "end" with this issue, plus 3 Jokers is suppose to be a Black Label title, I am quite sure, so it could very well be on its own, with only the aftereffects being felt in DC proper, but ... BUT ... not sure that will be the case. And if it does tie-in, in any form, like setting up what/where Geoff Johns needs the Joker to be, I may have to pull Batman back off of my DCU list and start getting it again. Before I even stopped.