I personally wouldn't expect any major announcements any time soon. Maybe one, for the diehards, to give them some "hope" for the event. Some needed encouragement that some sort of normalcy with the event is afoot.
However, the key to announcing stuff is based on how it will drive revenue. Movies like James Bond are being pulled, costing $50m in losses just by the marketing spent, because they know the movie will not deliver on revenue projections now with the virus.
Why would universal make announcements now? The borders are closed and international travel is banned, would people in the UK jump at the announcement and start booking vacation packages? My sister works for the local government and she's been told in order to travel across state lines, she needs pre-approval...otherwise it's a grounds for immediate dismissal. Think she's booking any vacations right now? Our local schools are saying 20 weeks before they're back in session....that's getting dangerously close to HHN time.
Not trying to be Mr Doom and Gloom, just being practical. Things months and months in advance are being cancelled...there has to be a point where it makes more sense, finanically, for universal to cancel the event than to put anything else into it. Maybe they're being smart and building in the tents and other structures that aren't used during the year so they can be mothballed for a year or until a later date like HHN in the spring. But there are beancounters and prognosticators and lawyers and everybody else pouring over everything. At some point, the finanical rewards don't warrant the risks.
Not to mention the fact that this won't be completely cured any time soon and the usual US flu season in the fall/winter will surely bring it back to an extent.
On the other side, if people are telling them that this should blow over by then and they need something to jumpstart the tourist flow again and something that is special and will get people to spend their hard earned dollars on again, going all out could be a very smart investment.
Just throwing out the business ramifications as there's a lot of "everything will be fine in x months" posts that ignore the business aspect assuming that POOF, the virus is gone and everybody goes about their business as usual lives. This is going to take at least a year to get back to any sense of normalcy. Hell, there are analysts saying that with the market tanking, Disney is now only worth about $165b. Apple has $100b+ in cash reserves and a market cap over $1t. These analysts are saying Apple could initiate a hostile takeover of Disney. When you put those kinds of financial implications into perspective, trivial things like HHN and announcements aren't even an drop in the ocean.