I've got a loose idea for a script - bit far-fetched but the best stories often are:
It's about a young lad with a sticky-up hair cut. He realises his dream to be ball boy at his favourite football club. He then goes for a trial with the same club and they like what they see. He then works his way trough the school boy ranks, making his professional debut at age 20. He then plays over 200 games for his beloved club.
Later, after he retired from football, he gets his coaching badge then lands a role as assistant manager of a club in a small, industrial, smokey town in Lancashire. He forms a bond with his boss but when a job to be in charge of his own team, albeit a non-league side, comes up he has to take his chances. After a while he realises he needs some help from one experienced head and his old boss has just been sacked, so he persuades him to become his assistant - the roles are reversed.
The partnership works and the two of them form a cohesive, effective unit. They guide their non-league side into the football league but then the fans get restless, wanting more of the same but quicker. He ends up being replaced and moves on to another side in the same division. They win the league in their first year despite financial problems and the club almost folding.
Then, the dream comes true. His old boyhood club has fallen on hard times. It's fans are revolting, the team is struggling in the old 3rd division. He takes over his old club, and together with his loyal, quiet assistant they win the league with record points at the first attempt.
Then there's a sequel. In the follow on film the young manager takes his beloved team up to the Premier League the following year, setting the Championship alight with his flowing football...
That's what I thought - too unrealistic - no one would ever buy the concept...