It's a convention exclusive (like the Heroclix Galactus was last year). The price hasn't been set (although we should know the weekend of Wizard World LA, which I think is this weekend), but I'd wager either $50 or $75.
Also, WizKids has another Heroclix convention exclusive, Dark Phoenix (phoenix miniature, inside a giant flame phoenix). Also, when you spend a certain amount at their booth, they have other convention exclusives you get depending on how much you spend.