Prediction for what happens:
-NHL buys the Coyotes off of Meruelo for $1 billion and then sell the team to Smith for $1.2 billion. The $200 million extra money is the "relocation fee" that will be distributed among the other owners.
-Meruelo keeps the team name "Coyotes" and is given a 5+ year window for building the arena, where if the arena is built, he will be awarded a new Coyotes expansion team to play in Phoenix at a reduced expansion fee cost (probably like $800 million). If he doesn't end up getting the arena built, the NHL abandons the idea of expanding a team in Phoenix (at least in the near term).
-Smith has the Salt Lake City team playing in Delta Arena for 2-4 years as Salt Lake City builds a new state-of-the-art arena, which they already have funding approval for based on trying to get the 2034 Winter Olympics. You hope they only have to play there for 2 years, based on the enthusiasm everyone seems to have in getting it done, but you can't predict what kind of issues will arise with that.
-When (or if) the Coyotes come back as an expansion team, Atlanta will be getting a corresponding expansion team to keep the conferences even. Atlanta will just join the Atlantic division and the new Phoenix team will join the Pacific division. If Meruelo ends up not getting an arena built, I think Houston ends up being the next expansion team in the West.