In the movie "Lone Survivor," when the group of Navy Seals get found in the woods by the enemy, one of the soldiers lists the options they have. He says they can tie the sheep herders up, and then says "They'll probably be eaten by wolves, or freeze to death." What is going on here with "will probably be eaten?" Why is the past participle of "to eat" being used? Which aspect is this? Does this have to do with the subjunctive mood?