Alright. Below is how I ranked everyone on the list based on my opinions. I've removed Samoa Joe because he's already been a champion and I think they'll have him around doing stuff no matter what...but I think his "breakout" time might be over.
I've said for years that Alex Shelley is the next Chris Jericho. The only think against him is his size (though according to wikipedia Jericho and Shelley are the same height) and his rumored bad attitude. He has the look, he has the moves, he can talk. He needs a mentor and a great angle and I think he can be huge.
I don't think anyone doubted the talent of The Pope aka Elijah Burke. I never understood they he didn't go to TNA earlier. Again, he has the look, can talk, and can wrestle.
Desmond Wolfe is a great heel. I can see him playing a Mr. Perfect, Jake The Snake, Million Dollar Man role. I say that meaning maybe he won't be the champion (or a dominant champion), but I think he has the stuff to stay around as a high profile guy who is always in the mix. It's guys like this that the IC title was made for, so lets get the Global Championship to have some meaning.
After that I think there's a bit of a drop off. The top three guys I mentioned are guys that I feel can be championship caliber wrestlers, or at the very least guys that people will mention and remember when they're gone.
I think Matt Morgan has potential. I personally love both Doug Williams and Magnus. Sabin is okay, but on his own he's not a top level guy. I like Eric Young, but I just don't think he's at the level that he somehow gets put into. Rob Terry I think is terrible...looks terrible, can't talk, wrestles terrible. And in my opinion he CLEARLY looks like he's has some help with his physique. If Rob Terry is your idea of a breakout star than it's sad to say, but I probably won't be watching then. Jay Lethal, while a great wrestler, I don't think he'll ever breakout. Same with Kazarian and Kendrick, as well as most smaller X guys. They're perfect for X division matches and extremely entertaining...just not top level.
Now with Homicide...if they want to go back to the old school LAX days and can get a great mouthpiece, I think he can be a standout, but only in a team/stable setting. LAX had the "cool heel" factor when they had Konan. Now I think we all know Konan is not coming back, and Hector Guerrero is not a fit. You can't just throw anyone who's Hispanic in there.
Alex Shelley
"Pope" D'Angelo Dinero
Desmond Wolfe
Matt Morgan
Douglas Williams
Chris Sabin
Homicide
Eric Young
Brutus Magnus
Brian Kendrick
Kazarian
"The Freak" Rob Terry
Jay Lethal