It is interesting that the pinned map of the area includes everything; including FOF and I305.
As far as the coasters go, Anaconda and I305 could certainly undergo a re-theme without major effort/cost. FOF and BLSC, on the other hand, would be a greater expense with the level of theming KD wants to do in that area. Indoor queue and station redone for FOF (including outdoor building facade). Maybe some major props in the ride structure building. A complete outdoor retheme for BLSC and maybe the dark section would get a nice theming package. Those would probably not be cheap to do. If done well, those renovations could headline an "off-year" for a major ride of attraction (Phase II - 2023?). I would then assume 2024 would be the headliner for whatever is going in Volcano's spot (Phase III).