FWIW, Pinhead on the Discord said "Hearing first house announcement mid-May" late last night. Set those expectations as you will. I see no reason to expect anything other than single tix and dates tomorrow as those are the usual first drops and since they've already leaked lmao.
Also from Pinhead just now:
"So folks, here's where wires got crossed yesterday...the announcement was always scheduled for tomorrow. However, there are a couple insiders with connections to travel agents, vacation sites and/or UK ticket retailers that got confirmation that they were going to be allowed to start selling tickets tomorrow...that led to the assumption (and a pretty valid one at that) that the announcement was getting moved up a day to today. While the announcement never happened, the tickets did go up on sale in various locations, including Universal Orlando Vacations.
So that's why things got so chaotic and mixed yesterday...but the official announcement is still LIKELY for tomorrow (because you never know). Have a great day."