Well, if we are real, and talk about weapons, you've got to see that WarCraft units really wouldn't stand much chance.
As you said, there's marines. They're human. In a big suit. Meaning you'd have beasts the size of druids of the claw firing fast pacing machine guns. If that wasn't enough, you could have some huge plasma shielded monsters armed with psi blade, who'd tear apart any type of metal armor. If that wasn't enough, swarms of zerglings'd own
