The idea is somekind of a manager game.
Users log in and create a team with players from the big 5 competitions from Europe (England, Premier League), (Germany, Bundesliga), (France, Ligue 1), (Spain, Primera Division) and (Italy, Serie A).
You can choose 3 players from each competition and put them in you're team.
You also can make a "Subleague" that is a league you can play with friends, family etc.
I think its a lot of database work.
I already got a list with all the players and competitions and what points the players are worth.
Also I have the rules for the game.