I can imagine a LOT of places where Disney might put a non-Park
DVC resort. Las Vegas is close to the bottom of the list. Then again, I thought ESPN would never directly endorse gambling within the brand, and we see how that turned out.
Now, if you want to
stay in Las Vegas, I'm pretty sure you can get some very inexpensive Getaways through Interval for cash. For example, Marriott Grand Chateau, just off the Strip between Hard Rock and MGM Grand, for late spring is about $900 for a week in a 1BR. That's between 1/3 and 1/4 what it would cost to book via Marriott, but it is non-refundable.