Thor got one Hel of a wicked idea and he had a grin that'd make Loki nervous. "Suppose Asgard was not here when Surtur arrived but rather it was somewhere else. Would thou consider this a victory, avoiding the possibility of Ragnarok?" It was obvious Thor had a backup plan should things go to shit but he left to hunt leaving Odin to think on what he'd said.
The Allfather was the ultimate deceiver of Asgard since time immemorial. Seemed like Thor was becoming more like his father every day.