Play Fantasy Challenge mode to unlock the following teams.

Team	How to unlock
AFC All Star	Beat them at the Supreme League or buy their card
Decievers	Beat them at the Supreme League
Dummies	Beat them at the Supreme League
Glaciers	Beat them at the Supreme League
Kickers	Beat them at the Newbie League
Manipulators	Beat them at the Black and Blue League
Monsters	Beat them at the Powerhouse League
NFC All Star	Beat them at the Supreme League or buy their card
Tridents	Beat them at the Supreme League