Pietrangelo will sign a team friendly deal with Toronto. Either something in the 1-2 year range. Or something longer term, but with a lower cap hit. Toronto will move Nylander to make room. Maybe they move Frederik Andersen after his bonus is paid to a budget team, and replace him with a cheaper goalie. With the amount they paid in assets for Campbell, I guess they might see him as more than just a backup, and they will need to clear more cap.
Ceci is the most fascinating UFA to me, because previously it has seemed like guys coaching in the NHL view him highly, while advanced stats guys, and fans think he stinks. When I say advanced stats guys or fans, I'm not trying to make an implication that they don't have valid opinions. He has been played like a top pairing defender by multiple coaches, but be is universally viewed by everybody else as terrible. I want to see if even with the cap issues, he at least gets something like 3.5 x 3-4 years.
I've got a feeling Arizona will end up keeping Hall. They'll do the same thing San Jose did with Karlsson. Take advantage of being able to offer 8 years, while also offering a higher AAV than anybody else is going to give. Ultimately, money will talk and he'll stay there. I could see New Jersey and Arizona working together to make it happen, because New Jersey has cap space to take on cap dumps and on top of whatever Arizona gives them to take on a bad contract, New Jersey also gets the benefit of further conditional picks from the Hall trade based on him re-signing with Arizona.
Holtby to Chicago makes sense. Crawford is 36 next season. Chicago doesn't seem to have any certainty in net beyond Crawford. Holtby would bring stability in net, and Chicago can afford the 5.5+ million he will cost. While Chicago hasn't been winning much the last few years, their organization still has a strong reputation from their days as a Gary Bettman certified dynasty.