I dont expect any major additions other than Gurdians, Tron, and new spectaculars during the 50th celebration, which they’ll probably milk for 18 months, smaller things like finishing up Moana and possibly some smaller additions like the delayed Mary Poppins at Epcot and a replacement for the spinning coaster in AK. Hopefully the resumption of the Marvel E ticket for DCA also. I won’t be surprised if they use the time to keep making infrastructure changes to help traffic flow and spruce up the resorts and parks.
Disney‘s been building pretty steady over the last decade, it’s just spread out over all the parks… they redid DCA, added Pandora at AK, added 2 Galaxys edge, added Toy Story land at HS, added Marvel at DCA, redid fantasyland, built Tron, Guardians, Ratatouille, etc… not to mention building a whole new park in Shanghai, a major expansion happening at DL Paris studio park, and a major overall happening at HKDL. Also non park projects like the skyliner, new DVC resorts, new cruise ships, etc.
As fans I think we all want more but they’ve been spending billions a year for over a decade, I wouldn’t be surprised if they use Covid and the 50th as a reason to take a couple years off from announcing major expansions.