The safe assumptions are:
1) The final points owners will receive will be for their 2041 Use Year.
2) The final day to use those points for a
DVC resort stay is 1/31/2042.
3) Full 2041 dues will be charged and there may be some proration for January '42.
With the contracts ending on 1/31/42, the above is all DVC is legally obligated to provide. They COULD choose to be more flexible--perhaps allowing owners access for their full '41 Use Year (i.e. December owners would have until 11/30/42 to complete their stays.) But DVC has no obligation to do so.
The proper expectation is to assume that you will have no resort access from 2/1 forward. Reservations will be doled-out on a first-come, first-served basis. Members who cannot get a reservation before 2/1 will simply lose their points.
Any ambiguities are entirely reliant upon Disney's willingness to go above-and-beyond that requirement...to grant access after 1/31/42. But it's unreasonable to expect them to commit to exceptions / concessions nearly 3 decades before the event will occur.