I would be shocked if they didn't do Dark Universe. They have movies already lined up to connect them all, with the Mummy kicking it all off. It would be a great platform to showcase what's to come, reintroduce what put Universal on the map to begin with, and make it relevant now.
There is a lot of potential there and Horror/Villans right now is a hot ticket. Look how Disney has started to celebrate their villains.