From the announcement:
Since it’s explosive beginnings in 2012, three season books, twelve teams, five giants and over 20 MVPs have followed the release of the Futuristic Sports Game.
Yet, we’re declaring 2015 the year of DreadBall.
This starts with Season 4. This brings four new teams for everyone to try, from the alien hosts of the Rebs Team (who are rather sweet in the rules I have to say!) to the hammer-head Sphyr Teams. There are also accompanying rules for which you’ll need to add pitch-invading Fans to your games, and reap the benefits of the Achievements system.