The FHS will serve as a league of sorts. We will go through 10 seasons, and each season you will earn a certain amount of credits due to how you perform that season. This is because we can't base it off of the superbowl winner that year, but the superbowl winner will get a significant amount more than someone who went 7-9 as opposed to the superbowl winner who went 11-5.
Here is how the credits will be distributed:
winning a game: 10 points
losing a game: -5 points
winning your division: 15 points
Coach of the Year: 20 points
MVP(having him on your team):20 points
other awards(Rookie of the year, etc.):10 points
Winning the superbowl:30 points

Example: Lets say I go 11-5, and I have the Offensive Rookie of the Year on my team, and I won my division. I'd end up with 120 credits for that season.
The superbowl winner went 10-6, but had no achievements. He'd end up with 100 credits.

So the superbowl winner won't necessarily always win the most credits that season, and the credits is what matters at the end of the FHS.