IMO:
Greg Inglis.... an obvious choice, but he will definitely be a contender for 5/8 of the year.
Anthony Minichello.... this guy would have missed playing League so badly. He will be giving 110% to get an AUstralian jersey, and shouldn't have any issues claiming a NSW jersey. Hodgson did nothing to risk him losing it.
Darren Lockyer... he won't top last year. But he has had a lot of pressure lifted from him with QLD winning, Australia winning, Broncos winning. If he lost all 3 this year, he wouldn't be the one in the firing line as in the past. He can just relax and enjoy his footy. And probably win for QLD and Australia with ease.
Now for the biased picks:
Brett Firman... playing for a contract. Was a massive talent way back when, and i think that he has the motivation to get back to his best form.
Peewee Moke... Centre, 5/8 and Lock. Big, fast, powerful. If he keeps injury free this year, he will be an insane bench player, with a lot of versatility.