I think Pharoah has the best chance since Smarty Jones in 2004. He has the distance bloodlines. His father, Pioneer Of The Nile, had all of his wins at 1 1/16 mile or longer, including the Santa Anita Derby. His grandfather (P.O.N.'s father) is Empire Maker, who won the Belmont Stakes.
But the mile and a half at Belmont is tough, especially when you have to face all those big, fresh horses who have been waiting for you, training only for the Belmont.