I've seen Las Vegas and Toronto mentioned as cities several times. Las Vegas has a couple of available rinks other than the Golden Knights' arena. I can't help but wonder what the ice would be like, though. The ice at Verizon gets bad enough in May in a normal year (this year would have been the exception due to the cool weather), so I wonder how an arena in the middle of the desert would do in July and August.
if they choose Toronto, they better hope American's can travel to Canada by then
https://www.nationalobserver.com/2020/05/14/news/canada-wants-extend-us-travel-ban