What is a good idea and many people have suggested this for a long time is start up a second world from scratch. Let people have a team in the second one. Think carefully about which nations to create. Start everyone on an equal footing in the lowest level of their nations so they can get promoted on merit. So many games have different worlds/servers why not BB? Some have suggested this be a supporter only world, I don't agree because I think it may make the playerbase too small but it is worthy of discussion. When new teams sign up they will have a choice of joining world Kobe (old) or World Lebron (new).
This is pretty much what I'm gunning for, with the only difference being you get one team and have to choose which world you put your one team in. If there were enough users to divide the new world into nations that would be awesome.