The cynic in me is still... well, I don't trust Bob Iger. I hope we can take his words at face value here, but my 32 years on this planet make me skeptical.
The thinking on me is, this is for Disneyland Forward; and it is the "Guarantee" sweetener like how Wizarding World of Harry Potter was for NBCUniversal Evolution Plan.
However in so doing; I think this warrants a question to if Disneyland Forward, would they genuinely want to expand DCA and DL the way that has been envisioned; or would they rather use the space that is planned for that as DTD/Parking expansion; with Toy Story Lot then being claimed for a large scale project that can warrant centralization.