I doubt very seriously that any of the 2042 resorts will close in 2042. In the case of VWL, BCV, and BWV, it seems the plan is to revamp the resort and sell more points that extend the resorts out another 25 or so years and then offer extensions and/or reclaim points in the out years.
I've thought about this and posted on it quite a bit. I think DVC will issue a special assessment based on the cost of the extended ground lease and assess it as either part of a voluntary extension or as a lien against resale.
4 options after 2042:
1. Owner holds "new" points with an ~2070 end date.
2. Owner pays a fee to voluntarily extend to 2070. This might involve a variety of carrots and sticks.
3. Owner sells as 2042 approaches and the resale triggers the lien and DVC gets paid for the extension and the new owner gets 2070 points.
4. Owner turns over 2042 points to DVC at end of contract and DVC resells as 2070 points.
Since option 4 involves owner losing all value and option 3 involves transferring some value and the cost of extension to new owners, very few people will exercise option 4. DVC isn't going to be stuck with many points.
This will extend the resorts, make DVC money on new owners, money on extending current owners, and money on forcibly extended resale owners without alienating current owners into a mandatory extension.
Money, money, money. That's the mouse way.
This is how DVC will make a new boatload of money every 25 years or so on each resort. Under this scenario, there is no worries on how to close a resort; the contracts are essentially renewably perpetual.