Yes. That's what is weird about this announcement. Foundations are well and truly done so a 2022 opening didn't sound far fetched. The fact this is now potentially dropping into 2024 is crazy.
Almost 5 years for construction? That's almost US Disney park speed!
Recentish aerial pic, expansion in red:
View attachment 11547
I mean, that's also counting to the fact that this will also bring another In-park hotel for Tokyo DisneySea, so I have to assume the infastructure work on this one (considering it's 35 acres as-well) is something to factor.
Would it of been nice to have it sooner? Yes. And that they've only just begun work in 2019. It's a 4 year project, but there is a lot to it.