Is there "anyway maybe"? Sure. All people can give is their opinion and it means nothing as nobody knows what Universal's release plan is. Even if Legacy responds, it's just a very educated guess. Hell, Universal doesn't even know their own release plan as stuff is always leaked accidentally first
I'm sure we'll start getting the "My friend's boyfriend works at Universal and he was told that XYZ." and those probably turn out to be true about 25% of the time. That's not to say that the poster lied, or the friend lied, or the boyfriend lied, or the person who told the boyfriend the info lied...it could all just be a misunderstanding and a game of telephone. Or the poster could just be someone who wants to feel important and makes something up to get attention. Both instances happen every speculation season and with the lack of speculation around houses (1 to possibly 3 houses are the only ones that can be speculated about) there are going to be some people trying to fill the void with false information for their own entertainment.
But back to your question, if the rollout goes well and it's very busy there will probably be some "lessons learned" for how to handle some stuff and maybe some more implementation of the virtual queue that could be adopted for HHN. But a single ride in one park opening during the day for regular day park guests to be an apples to apples comparison to a separate park, add on ticket, night time event, with ~20 special attractions (houses, zones, shows, and mini-zone shows) isn't very helpful. Not to mention the night time / alcohol / "all rules are off" mentality of some guests that are all very different than during the day.
Also, if they rollout tickets and people like us scoop them up ASAP worried about limited availability and the like and they have to cancel the event, that's a major headache for them and us. Stuff like the food lanyards for Mardis Gras from last year, they didn't refund unused food & beverage tickets/credits when they closed the park and cancelled the event, they told everybody they could be reused next year. Would they refund the tickets? Or would they just tell us to hold onto them and say your ticket is good for 2022* (*so long as 2022 is a go)