https://www.tsn.ca/hub-cities-begin-submitting-proposals-to-nhl-1.1471924
I would guess Buffalo has a strong chance of becoming an NHL hub city. Between Key Bank Center and Harborplace you have 3 NHL rinks, locker rooms, training facilities, hotel, food service and media infrastructure, all in a space that can be sealed off from the general public. Not to mention top-shelf medical facilities just up the street.