OKW used to expire in 2042 because the lease for the land expired in 2042 (like the other initial resorts). DVC decided to do the extension extending the lease, basically extending the contracts to everyone and then asking owners to sign the quit claim to renounce to the last 15 years of the lease.
Someone say that since the lease is extended and you haven't signed te quit claim, DVC cannot deny you to continue to use your membership. If you want to sell, they require to sign the quit claim, so you cannot resell it with the later expiration, but if you keep it they cannot force you to sign.
What will happen in 2042 is not certain, but this is the theory.
What we know for certain is that DVC will not do another extension in the same way, really too messy. My guess is that they won't extend BCV and BWV (they'll be two gold mines with revised
point charts and higher buy in cost), close/sell Vero and HHI and resell as a new resort BRV with a shorter expiration to match CCV and then resell both as a merged resort when they both expire.