Prospective Utah NHL owner.
I feel like the internet favorites are the Yeti and Swarm. I'd be fine with either.
Raptors and Cutthroats are probably both out. Utah Bighorns is too memeable. The Utah Blizzard gets into avalanche territory, and can run into an unfortunate Twitter trend. (#UtahBlizzard delays rescue attempts, at least 3 missing.)
The proximity to Denver is a question. It's not particularly close. It's a 500 mile, 8-hour drive, but if you call yourself the Utah Broncos, or the Utah Pioneers, it sounds like the Denver Broncos or Denver Pioneers.
No one calls themselves the Scorpions. The mascot may be too tough to figure out. Outlaws? Pronghorns?
This is what's tricky about everybody expanding. Many of the obvious, classic type names are already taken. Then you deal with other team mascots, and search engine optimization.
Would a Houston NHL team go with a space theme when both the Houston Astros and Dallas Stars already have fuzzy green alien mascots?
What about something living in the Great Salt Lake? Funny thing, multi-celled organisms don't do so well there.
They did find a nematode recently.
There's also
a legend about some guy moving two whales into the lake, but that's such a deep cut reference, I don't think you can do much with that. Maybe a mascot if they go with a name that doesn't lend itself to anything obvious. Something mysterious in the water is also Kraken territory.