I don't know .. Disney has a history of keeping infrastructure around for closed attractions for a LONG time - the entire Wonders of Life Pavillion. The Odyssey Restaurant. Stitch's Great Escape, etc.
Indiana Jones has needed to go for a while .. since it is the final holdout of the old "Making of Movies" theme that MGM Studios used to be (and is no longer). Most action movies aren't even made that way anymore .. it's all just green screens and CGI.
I'd love to see Lion King and Nemo back with a new script.
As for the ancillary streetmosphere. I think they will bring them back slowly, but really they have been essentially replaced by something very similar ... the character cavalcades. Having these things in LOW crowds is probably better. Honestly .. I never realized Citizens of Hollywood were a thing until I started reading these forums years ago, as the Old Hollywood section of DHS is just a "pass through" anyway. They aren't quite as immersive as the stormtroopers in SWGE.
Disney has an issue right now with not enough to do to spread out the crowds (which you need to do even more in a pandemic) ..especially in parks like DHS and AK and EPCOT.
Wonders of Life lost it's sponsor. Anything in EPCOT without a sponsor was shuttered. That's how the Park was run. It was a stupid model that left EPCOT in serious need of attention, but that was the situation and Disney held that line 20+ years after it's due date. I have no doubt if some company wanted to sponsor Wonders of Life back in 1999-2007, it would have stayed open. Once Body Wars started being cannibalized for Star Tours, even that became a non-starter.
Stitch's Great Escape has not been closed all that long. Now I'm not saying it won't be, especially now, but it's been less than 2 years. That attraction is particularly difficult to re-imagine. It's an odd shape and size. EPCOT hardly needs more restaurants, so closing Odyssey was probably strategic. Though why they keep adding restaurants, especially in World Showcase, the one place on property you can pretty much always find a walk up sit-down meal somewhere, I just don't understand. Never have and I suppose it's a hole in my argument.
The point is, these are somewhat special case items. I just don't see popular, people eating attractions like FotLK not reopening when Disney starts operating more normally. It's a signature attraction at AK. Some of the others are in need of a revamp, and it wouldn't surprise me at all if Indiana Jones doesn't reopen, though with the pressure on DHS these days I think it would be foolish not to have something there to pile in a couple thousand people for 30-45 minutes.
Anyway, we will see. I'm not a Rose Colored Glasses WDW guy, I'm plenty critical of them. But right now, they are doing things that absolutely suck for stakeholders, especially Cast Members, but make a significant amount of sense given the environment. It's simply too early to criticize them on the assumption that things won't reopen when times are more normal.
While Disney has certainly cut some beloved things in recent years, they also invested heavily in new fixed attractions. We tend to lambaste them for the cuts a lot more than we recognize them for the investments. And right now we are lambasting them for cuts on items that are closed for reasonable reasons. I'm willing to hold off on that criticism until I see if they reopen or refill these attractions when it becomes more reasonable to open based on crowd and social restrictions.