Would like to see UA rebuild some of their presence in Canada. The recent announcements of SFO-YYZ and ORD-YHZ are a good step! A few other gaps to fill:
EWR-YYC (UA metal, offered by AC currently)
EWR-YYT (perhaps summer seasonal given the growing tourism - used to be a year round route before it was cancelled)
LAX-YYC (UA metal, offered by AC currently)