We had this happen at Briarwood in Cape Cod. The units were originally planned as townhouses in the 1980s; when they didn't sell, they made it into a timeshare resort. We bought our week 30 unit on eBay around 2008 and had it for about ten years. During that time, the resort decided to sell off some of the units as townhouses. There are different buildings at Briarwood, and you would have thought that they would do one building at a time, but they didn't--they would gather up the weeks for one unit here, one unit there, so if you were staying there on vacation, you might be right next to someone's home.
Eventually they got to our unit and they offered us a modest sum (but still more than we had paid for the week), or to move us to a different unit for week 30. They did not offer the "wait and see" option. We took the buyout option and we were happy with it. The townhouses sell for a very tidy sum, and the amount we were paid was a tiny fraction of that, but we were still happy.
There's at least one other resort on Cape Cod that just suddenly told owners that they were going out of business and that was that, although the real estate there would probably have been even more valuable. Not sure what's going on there.
In any case, I guess if I were you and I still enjoyed my timeshare and still used it, I would let them move me to a comparable unit.