I think expectations for whatever this will be, will be through the roof.
Thinking about this golden era for Universal, I see 3 phases. Phase 1 starting with Hogsmeade. Phase 2 starting with Diagon and ending with F&F. Phase 3 looks like it's going to raise the bar well beyond everything else we've seen so far.
If we are going with the phase treatment, I'd say more akin to this,
Phase 1, introduced us to the Wizarding World, allowed us to become Minions, save the world while protecting the allspark, eating and drinking at new and exciting offerings, along with relaxing in a 1950's environment all capping off with returning to that Wizarding World, with what is a crowning achievement in themed engineering.
Phase 2, while slow at first; kicked off with a bang, as we saw a King and a big rage monster reborn, with a southern way of living along with a steampunk dining feast. And, that you can now race Jimmy Fallon in an epic, out of boundries, race through New York; going to a lost home of slides and themed entertainment of the southern pacific, along with meeting an action packed family, that will be similar yet different in many way's.
And then, Phase 3. The Wizarding World gives us another peak into their curtain, with the introduction of one of the most popular brands in mass media coming to life in unique and extravagant way's, with it all going much further; down to new land of endless opportunities and experiences that everyone will enjoy.
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That being said, it will be interesting to see whatever the hell happens. Whether it's a indoor/outdoor coaster, a next generation dark ride, or whatever it may be, it is exciting nevertheless.