Universal has made no announcements about the future of The Simpsons Ride or the surrounding Simpsons-themed venues. You presented what you'd heard as established fact. There is evidence that suggests they are exploring demolishing the building, but nothing has been officially confirmed, and there are no markings around any other buildings in Springfield, to my knowledge.
Do I personally think The Simpsons Ride will go, and the surrounding area replaced? Yes, at some point. Do I know that for certain, including the timing and what might replace it? No, and I don't pretend that I do.
I'm sorry to harp on these kinds of things, guys, but we need to keep ourselves honest when speculating. The whole "Simpsons goes in 2028" thing has never been rooted in any sort of verifiable evidence, either, it's just based on a set of assumptions.