My guess is it will change to Jan-XXX.
I can't see them fulfilling Oct orders in Dec when they are just fulfilling Feb and beginning a few Mar orders right now. Most of us with March orders have EDDs in October to early November.
Of course Tesla does like to screw over people that are paying a lower price than current so they may screw some of us pre-June price increase orders over and fulfill July-Sep orders but I still can't see them fulfilling Oct orders in Dec as those won't be paying any more than July orders (unless ordering FSD).