A sports movie in which the great lesson of all is learned off of the field. And there is a disadvantaged player who needs the game to survive. Also, they are underdogs. Also let's tie it to an historic sports event. Blerg.
I'm kind of sick of underdog stories period.
Frankly, I'd like to see a story about the "big team." The one with all the sponsors and statistically are expected to win, but the crowds boo them and demand they lose. How could that work?
Well:
1) Don't make the underdog team out to be "loveable goofs." Instead make them arrogant pricks, but of course still have them be the fan favorite. The ones everyone wants to win because they're underdogs after all.
2) Explore what it would be like to be on the team everyone hates. What it is like to be the team where the only ones truly on your side are numbers and statistics. What it feels like to have the "pressure to lose" just so the crowd can have their underdog story on their shoulders.
If you need a real-life event to base this on, look no further then the New England Patriot's near perfect season. The one where they were 16-0, won their playoff games, and then lost the Super Bowl. Just like (nearly) everyone who I heard talk about it wanted it.