Some comments copied from main DVC forum
Florida timeshare law says you can't sell until 70% completion (or something close to that %...I may be off on the exact #) is achieved.
AKV was able to sell quickly because 70% of the construction on the Jambo units had been complete for about 5 years....because they were remodels of existing lodge rooms that were built out already.
CRV wouldn't be able to sell units until 70% of the building for those units is complete....and that's a LONG way from bare ground. I think the speculation is, it will sell well.
Disney wants to sell AKV and SSR units in the interim. They KNOW announcing CRV will likely make some people wait to purchase there, canabilizing sales for the existing WDW resorts (AKV, SSR, and even "new" OKW). So there's some logic behind not announcing what it is.
In addition, you can look at it from the flip side: IF it were only a hotel expansion...what POSSIBLE reason would Disney have for delaying the announcment that that is what's going on. I mean, it's obvious they're building SOMETHING so why NOT tell people what it is? Unless there is some reasoning behind it.