It sounds like the software developer will create the game, use generic teams and logos, and include editors for uniforms, stadiums, and rosters/players. Creative gamers will come up with the teams and players, and make them available for download. This is something they do now with the pro sports games. Don't want to pony up for a new Madden (or NBA or NHL) every year? Download a roster. There are still guys making rosters for NCAA Football 14. Yeah the uniforms and logos are looking old, but I can still "coach" the Zips.