I think if this happens to Epcot it would be a stunning revival:
World Showcase
France The rumored Ratatouille: L'Aventure Totalement Toquée de Rémy (170M)
The American Adventure New projectors, and slight refurbishment of the animatronics and theater. (20M)
Festival Kiosks Will be housed in new permanent structures that don't block views of IROE and are much nicer. They won't be used all year, but they would be a nice addition to have during most of the year with the festivals. (30M)
Future World
The Universe of Energy The rumored Guardians of The Galaxy Coaster. (220M)
Wonders of Life Future Expansion plot/pad for the next attraction. (N.A.)
Mission: Space Major upgrades with a completely new film, and effects to help not cause motion sickness. (50M+)
Test Track Stays as is, but gets a small restaurant between Mission: Space and itself. (15M)
Imagination! As a Phase II Epcot Overhaul, it will be demoed and restarted from scratch with a far better Figment & Dreamfinder attraction, and with new glass pyramids, a new DVC lounge, show, and restaurant. (300M+)
The Land Soarin' stays as is, Living With The Land gets an overhaul, and Circle of Life gets replaced, and interior gutted. (100M+)
The Seas Updates throughout giving it a much better theme with the main entrance now being the Gift Shop. Possible new attraction: a Kuka Arm Nemo Deep Sea Attraction, or a higher capacity version of Crush's Coaster. The Seas becomes the Seas again, but with the Nemo ip enhancing the story by having a smaller but important presence, not messing it up like it is currently. (200M+)
Spaceship Earth Along with the rest of Future World, the shops etc. around it will be updated. New buildings from under the ball to the Massive Fountain will keep the future consistent instead of a forest. SpaceShip Earth the ride gets MagicBand updates, and two more scenes while going backward. (For Spaceship Earth & surrounding area: 30M)
Innovations Major updates to the facades, and new attractions & restaurants will call the former Innovations and Future World its home. (300M+)
Park Entrance
Ease of access is a priority, with a streamlined futuristic non-graveyard look. Updates include the Monorail Station as well as the Bus Station. (100M+)
Total Cost: Upwards of 1.5 Billion
*This is not what's going to happen. This is purely speculation, guesses, and ideas to help bring the park back to its glory days in a realistic way.*
Could any Insider possibly confirm what pavilions will get additions currently?