yes you are right.
i mean the PV will be less stronger.. AO will peak strongly positive early next week before drifting back towards neutral.
however in AER, they say : " if our expectations of more upward pulses of WAFz is correct, this should be sufficient to force a sudden stratospheric warming (SSW) sometime in January"
i think SSW makes the PV very weak which mean AO negative ... am i right ?