Cardinals - In the NFL you only need to be a pretty good team that gets hot at the right time. Once they retire Palmer, and if they can strike gold on a replacement, they could be there any year.
Suns - Sarver doesn't seem to be interested in playing the owners game that wins championships. He has his team, and wants his new stadium, and if they win then cool, but if they lose then whatever.
Coyotes - It will be hard. SC is the hardest championship to win. A franchise can be a perennial power, with the best players in the world and still never win (St. Louis, Vancouver, San Jose, Washington) and the Coyotes are long way from being a perennial power. If they can get out of Glendale, get some success and a stronger fan base, they might be able to start attracting UFA's that people outside of the HF Boards have actually heard of. If all that happens, then they have the hardest path of all the sports.
Dbacks - Who frickin knows. Every time they look like they are starting to get it together they implode.