We saw a pretty Herculean effort undertaken with Rapterra at Kings Dominion in 2024 to build the entire coaster while keeping all of the other rides in the area guest accessible. Assuming they're plotting the same playbook, expect a long, narrow path of Epcot-overhaul-style construction walls through the , middle of the construction site.
I think the rumor about Superman being open all season probably does give us a good idea of the scope of Phase I of this overhaul. I imagine it will be largely focused on the south side of the area + wherever the specific ride(s) is/are going in. Presumably a lot of the land will be left for Phase II in 2027 or even subsequent phases in the years beyond.