Lots of specific details are weirdly being scattered around all over the place, not fully contained in the PR. Disney did a press summit on the expansion that gives away a good deal more:
https://www.facebook.com/MagicPost/videos/1348506835194286/
Specifically at 3:40 they go into high detail at the Frozen land's "E-Ticket" ride. Surprise! It's Frozen Ever After. Yes, a near-direct clone, although one hopes there are significant changes to the overall design dynamic including the boat capacity. Don't be shocked when this comes to a Disney park close to you... maybe really, really close. It's now Disney's version of Minion Mayhem, after all.
(for the record, I like Frozen Ever After for what it is, but I would still prefer a different attraction for an original build)
Also including is Oaken's Dancing Sleighs, which will be an indoor version of Luigi's Rollickin Roadsters with what sounds like a way to up capacity: guests will presumably board the trackless sleighs in Oaken's shed, and then will go out onto the ice to dance in front of the queue line. So while one group dances, the others board. Also included is either an Olaf figure or AA, so props to them for giving a family flat ride a surprising lot of dressing.
The land will include stunning vistas, shops and restaurants and will open in four years in 2020 per the blueprints provided in this tweet:
https://twitter.com/DLPWelcome/status/800985384305983488
There's of course the castle, which contrary to what you may have heard is not completely new. It'll still stay Sleeping Beauty's Castle and even the current clone castle will stay. Instead, the castle will be extended upwards, essentially putting a Cinderella Castle-esque topper on it. I'm mixed on it as while I get the intention to stand up to Shanghai and be bolder in facing the competition from Ocean Park, it will completely throw off the scale of Main Street and may be a bit overpowering. The idea of a thinner, slim skyscraper to the top will help in delivering the contrast between the wider castle in Shanghai. Also included is a redo of their hub as well as flanking WoC-esque fountains similar to what's in Paris to deliver a projection-based fountain show. Also, because of course, there will be a stage in front as well. This will be completed in three years in 2019.
In Tomorrowland, two new Marvel attractions will accompany the Iron Man Experience which is opening in two months. Buzz Lightyear will shut down early next year and will be revamped into an Ant Man-themed shooting omnimover ride. Yes: an Ant Man ride. I never thought I'd see the day haha. That will open up in 2018, presumably late in that year. Meanwhile, either on top or replacing Autopia (they won't confirm either weirdly enough) will be an unnamed Avengers attraction which is going to open up in seven years (wow) in 2023. Whatever it is, I'm guessing we're not finding out anytime soon.
The last one is a small Adventureland expansion, as they will be debuting a second show next to Festival of the Lion King themed after Moana, opening in 2018 presumably before Ant Man, making this the first of the expansion efforts to open.
So that is:
Moana show -- early 2018
Ant-Man ride (Buzz overlay) -- late 2018
New castle/nighttime show -- 2019
Frozen Land (Frozen Ever After/Oaken's Dancing Sleighs) -- 2020
Untitled Avengers attraction -- 2023
This also ties into a third hotel opening next year, and I wouldn't be surprised if future outer infrastructure occurs in that time as well. I'm impressed with Hong Kong stepping it up, and there's still yet another expansion pad left open between Frozen and Toy Story Playland for the future, in addition to that space for a second gate. Good stuff ahead!