Well, the rumor was that Arlovski didn't want to resign with the UFC. So, they in turn put him against a strong wrestler (a terrible matchup for him) on the undercard. The UFC hasn't been playing very nice lately.
Evan Tanner got no present in his welcome back opponet. This one should let us know exactly where TAnner's head is.
I think Herring vs Kongo will be the fight of the night. These are two very large heavyweights who like to strike. Kongo has no ground game to speak of, but he's getting better. Herring has a ton of experience, but really isn't much of a ground fighter either. Sparks will fly!
Henderson has stated that he plans to stand and try to KO silva. I don't think that will last too long, as Silva has crazy long limbs. Henderson's olympic level greco roman wrestling should eliminate any possibility of knees from the clinch, as he'll keep Anderson nice and tight and won't hesitate to take Silva down once they get tied up. Once it hits the ground, Henderson has a huge advantage.