I wouldn't be surprised if they had Skrulls. Why not just come out and say they're going to have Skrulls instead of using Skrull stand-ins?
The army looks like Korbonites to me, apart from being grey. Would be cool, as we'd get Beta Ray Bill, and it explains the giant ship of theirs, which in the comics is sentient. But people mostly expect them to be the Ultimate version of Skrulls, the Chitauri, as to have the Skrulls in the film without actually calling them Skrulls.
Edited by BadassCyborg3000, 01 April 2012 - 01:11 AM.