I'm keeping things vague to protect my sources, but these are my guesses of what we'll see announced, by Bob Chapek himself no less, at this year's D23 Expo:
MK:
Main Street Theater resurrection
New Space Mountain track
Tomorrowland retheme, including:
Stitch replacement
Tron Raceway overlay
Tron opening date
New nighttime parade, featuring your favorite Pixar and Encanto characters
Encanto M&G
New Encanto dark ride replacing Mermaid
Splash Mountain closing date
PatF opening date
Hall of Presidents closing date
Liberty Square Theater replacing HoP, featuring Encanto-based Broadway-quality show showcasing immersive storytelling based on Disney technology
Epcot:
SSE retheme featuring Encanto storytelling immersion
Play! pavilion opening date
Moana opening date
Seas refurb
Imagination refurb
Mary Poppins ride resurrection
New Columbia pavilion featuring an Encanto ride
Mt. Fuji ride in Japan
Reine River attraction at Germany
Mexico retheme with Coco overlay
DHS:
Star Tours retheme
New Indy ride replacing stunt show
New daytime parade, featuring your favorite Disney Junior characters, plus Encanto
RnRC retheme into immersive Encanto-based experience (featuring Olivia Rodrigo)
New connecting path and land between Sunset Blvd and Toy Story Land
New Encanto storytelling show replacing Frozen show
DAK:
Zootopia land
Dinoland retheme
New Nemo show
Daytime parade, featuring Mickey, Minnie, and Encanto
Yeti replaced
Kali expanded by 200%
ITTBAB replaced by Encanto 3-D movie
Upcharges:
Premium Kilimanjaro Safari Immersive Experience (animal experiences not guaranteed)
Characters+, featuring ILL purchases for the most popular Disney, Pixar, and Star Wars characters
Genie++, featuring back-door ride entrance - No more mingling with the poors in line!
Food Plan+: Special dining areas featuring unlimited beverages and buffet-style offerings (Upcharge for protein and certain dishes)
Enhanced ticket pricing that will prioritize guest satisfaction by guaranteeing 7 experiences per day (Additional experiences and daytime activations extra)
There could be some unexpected surprises announced, like the expansion of the Skyliner to all theme parks and resorts, plus Disney Springs, and a never-before-seen transportation option between AKL and DAK. But I'm sure Bob is saving a few more things as double-secret surprises at D23.
And, all of these could be completed by the time Epic Universe opens! Disney has been deliberately slow-walking things lately, and have a record number of construction crews ready to work, along with building materials that have been ordered, delivered, and are currently stockpiled in secret warehouses in and around the Orlando area. Bob wants to be seen as the second coming of Walt Disney when it comes to surprises in Orlando, and is sparing no expense to make that happen.