for my reroute, i think i'll spend an extra day in HKG (arriving HKG from GUM the night of 10/28, departing HKG the afternoon of 10/30). i'll fly NH to HND, spend the night and next day in tokyo, and then NRT-ORD-YUL on UA.
i considered doing something similar via ICN (to go on a tour of the JSA) instead of tokyo, but the friend i'm traveling with preferred tokyo.
i'll wait a couple of days before i call in, as i look forward to hearing other reroute ideas!