D23 Expo 2019 Predictions:
-Star Wars Galaxy's Edge Recap
-More Runaway Railway Details
-More Skyliner Details/Opening Date
-Disney Cruise Line Expansion Details
-Beauty and the Beast Land Details (Tokyo)
-Disneyland Tomorrowland Overhaul
Marvel Land Details:

-Details on Interactive Spider-Man Attraction
-Avengers Roller Coaster (Hong Kong)
Epcot Overhaul Details:

-Details on Epcot's Nighttime Shows
-Future World Overhaul Plans
Magic Kingdom's 50th Anniversary Details:
-Tron: Lightcycle Power Run Details
-Wreck It Ralph Interactive Attraction
-Magic Kingdom Nighttime Parade
Important Notes:
-Disneyland Tomorrowland Overhaul is unlikely in my opinion, however, if it gets announced, they will probably spend a lot of time talking about this specific topic (Tron: Lightcycle Power Run, Hopefully the Peoplemover, etc.)
-Epcot Overhaul Details will most likely be a very important part of the parks and resorts presentation (Guardians of the Galaxy, Disney Play Pavilion, Mission: Space Restaurant, Remy's Ratatouille Adventure, etc.)
-Avengers Roller Coaster in Hong Kong Disneyland is unlikely in my opinion, however, if it gets announced, they will probably spend a lot of time talking about each of the Marvel Lands (Anaheim, Paris, and Hong Kong)
-Magic Kingdom's 50th Anniversary Details have a high chance to be announced at the Destination D Event 2020 in the Contemporary Resort near Magic Kingdom, rather than the D23 Expo 2019
-The main point to take away is that Disney will most likely try to focus on Marvel Land and Epcot during the parks and resorts presentation

- Indicates possible important points of the parks and resorts presentation
(Remember, these are just my predications. Most of these are all probably wrong, but I think it's fun to try and guess! What are your opinions on these predications?)