I guess they couldn't resist doing a Harley and Ivy story .
I don't think they outright said the chandelier killed him.So did Straightman suddenly coming back to life to save Joker.
I'm going to assume he's been starting to split his time between Gotham and Bludhaven until finally moving to Bludhaven outright closer to the events of the ROTJ flashback. And in the couple weeks these issues take place roughly November-December, Nightwing was in Bludhaven working a big case of his own or was even out of state. And no one bothered to (or would) ask him for help. I mean, Alfred should have and would have but... idk, Nightwing was incommunicado for whatever reason - undercover, etc.I also noticed that, despite Dick being put in multiple covers and mentioned a few times, we never actually got to see him. I guess there's the bonus Christmas story coming out, but I'm not holding my breath.