To me Patrick Crayton is the X-factor. He has big play capabilities just as well as Austin, and he showed that last week vs the eagles. I'm sure he can do it again vs that vikings secondary, and could end up being the difference in the game.
I'm also gonna throw Marion Barber out there. Everyone is focused on Felix after last week, but look, Barber went to college and played in this dome, and I know he's fired up and wants to have a big game. I'm sure he'll have some family there. He will be running guys over left and right. Look for him to have the biggest game at RB.
Finally, Romo of course. If he plays like he has been since.... gosh, most of this season, then we have a great chance of winning this game. He won't need huge numbers, but a fast start, and something like 24-34 for 280 and 2 TD's will be enough to get us a W. (I'm reserving some TD's for the RB's, as well as the defense...yep, I think we get a defensive TD in this one)
I'm changing my prediction... Cowboys 38 Vikings 24