from what i heard, there is going to be additional dlc that has stadiums and all nfl throwback uni's for all teams. i dont know if the dlc for the stadiums and unis will be one pack, or seperate packs for each team.
i posted about the afl legacy dlc in the madden thread in consumer digest:
http://forums.twobillsdrive.com/index.php?showtopic=95259
i like the grainy look for the throwback games