A new league will automatically be generated with an allocation draft when all the leagues of that type are full - otherwise we will have a hard time keeping the older leagues active. The best way to get new leagues is to encourage the people you know who would enjoy the game to join a team in an existing league! You're also going to do much better in an allocation draft if you've spent time in an established league just because you'll be much more familiar with what you need to look for.
