Both conferences in the National Football League will be hosted by teams with strong home field advantages. The Denver Broncos strong home field advantage has a lot to do with the altitude in Denver's Mile High stadium. The air is thinner and can get to any athlete in a relatively short amount of time. The Seattle Seahawks fans pride themselves in their home field advantage and call themselves the 12th man.
The Steelers and Panthers find themselves coming into this game off of 2 consecutive road playoff wins. It is not easy to win three consecutive road games because of fatigue and jet lag. Being on the road for a long time is tough on any team. The Panthers finished the regular season on the road and have been playing road games since New Years. They may even have been travelling on the road since around Christmas.
The Panthers and Steelers are both very strong road teams and will not fall flat on their faces but the situational disadvantage of being on the road for so long couple with the strong home field advantages of Denver and Seattle, there is very little reason to believe there will not be a Denver-Seattle Superbowl.
Denver opens up as a 3 point favorite and Seattle opens up as a 4 point favorite. Both home teams should cover the spread.