The Guard would win. Okay, the standard lasgun won't do much, but when the Russes and Lascannons and big stuff comes along, he's paste. A bunch of Lascannons would evaporate him, no matter how mad he is. If he is in a good position, he could kill hundreds of the guardsmen, but sooner or later a big gun will get a lucky shot, and even if it don't kill, every single gun in the army would fire afterwards.

There simply ain't no way the hulk can win. The guard could take out Abaddon if he was unsupported, so how the heck could poor Hulk do anything serious?