Here's what I see
Phil Heath - Obvious choice, became Mr. Olympia last year, threatened to take it the previous year and continues to put on noticeable size w/o losing any conditioning and remains injury free.
Kai Green - While some people will say his conditioning has regressed the last 2 years he has made noticeable gains in size which was obvious at the New York pro and he placed 3rd at the Olympia last year. An argument could even be made that he was the best man on stage at the Sheru Classic.
Dennis Wolf - minus his left calf mysteriously disappearing, he was 5th in the Olympia last year he has come back to be a top 5 threat
Evan Centopani - Noticeable improvements and a 3rd place finish at the Arnold this year.
Brandon Curry - Although his legs haven't improved much they have improved along with his conditioning which was enough to catapult him into 8th place at the O last year. This speaks volumes about how great this guys upper-body really is. We rave about Johnny Jackson's upper body but Curry comes in with the same legs and maybe even worse conditioning and he snags 8th at the O !