**They will be following the Anglican Use Rite.**
***This is almost certainly not going to be the case.***
Yes, it is. You are correct that the current “Book of Divine Worship” will probably not be used. But that is because a new missal is being worked on now and is supposed to be ready by Christmas. I heard about it at church on Sunday (St. Mary the Virgin Anglican Use Catholic). It will be influenced by the English Missal (Knott Missal), the American Missal, the Sarum Rite, and the Coverdale translation of the (Tridentine) Roman Canon, all very English and all very Catholic.
Interesting! I don’t see the BCP in your list of sources; is the new Anglican Use going to be essentially a Sarum/Tridentine sort of rite in dignified KJV English?