I don't really know how you can change the formula of a sports series tbh
I mean, what can you do aside from SPORTS SPORTS SPORTS? There are not a lot of alternatives.
The "high school kids chasing their dreams" formula seems to work for the majority of people who enjoy this kind of stuff so there's not much point in doing something different. Especially when the target is middle-school/high-school kids who can easily identify with the characters and their objectives.
Maybe you're just "too old for this shit!" firehawk-kun!
The problem is that Japan doesn't acknowledge class, race, or homophobia, so sexism is the only thing that they can use. Hence Ginga e Kickoff dealing with a girl who feels "bad" because she can't keep up with the boys and finding inspiration in Nadeshiko Japan.
I mean, imagine being a Brazilian Japanese returney. The kid comes from the biggest soccer nation in the world and wants to play soccer in Japan, but is treated like shit because he speaks Portugese or speaks Japanese with an accent. Being unable to communicate with other Japanese players, he does what he was born to do - play soccer. The Japanese kids realize that he's like them, just a boy who loves the sport, so they stop making fun of how he speaks and decide to let him join the team.
It's not rocket science.
I stopped following GK once the anime ended.
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Look, here's a recent sports film that I quite enjoyed - it even won an Oscar:
http://en.wikipedia.org/wiki/Undefeated_(2011_film)
The story it covers is cliche as fuck, but you root for these kids because they are compelling human beings (well, they are actually human beings since it is a documentary).
Japan anime/manga, at least, just doesn't seem to be interested in covering the more complicated aspects of society.
Heck, you could spin off the Silver Spoon story with the baseball kid and have him go through a "Hoop Dreams"-esque story about trying to overcome poverty through sport. That's a classic story that is immediately identifiable to millions of kids around the world - whether it's a kid in Harlem practicing his free throw, a kid living in a Rio favela kicking a ball around, a kid on a rice patty picking up a ping pong paddle.