Shane/Shawn will be a crazy enough brawl to make it worth the time. I mean, it's a street fight, so you know not to expect a mat classic or anything. The tag match has the potential to be good.
EDIT: Another reason I don't think it'll be bad is I don't think Vince is dumb enough to do stupid shit on a prime time network special like he'd do on his weekly shows. Then again, he might go all out and have a segment where the Boogeyman eats worms for five minutes while Pirate Paul recites lines from Pirates of the Caribbean.