The dome team that I think would do well in a cold climate Super Bowl would be the Minnesota Vikings. The biggest reason is because they are a cold climate any ways so they are use to wind, snow and rain in the every day life. They wouldn't be as affected as maybe a team like Dallas or Arizona.
My second choice would be the Atlanta Falcons, they just have a great team and think the cold climate wouldn't hurt them they much. I am anxious for this season to start and see what teams will be in New Jersey/New York next February.