The chances of any sale of DVC actually going through and being completed are slim. Most times talk like this is just talk - it doesn't even look like it was from within Disney. That said, there are a LOT of reasons your value could tank practically overnight - a terrorist attack at WDW would do it. A mass shooting. A natural disaster. DVC can be a good deal, but it isn't risk free, and to make it work, you need to be able to take the small risk.