http://www.boston.com/sports/football/articles/2007/05/10/nfl_considers_adding_17th_game_to_season/ suggests that the NFL might add a 17th game to the season (taking yet another away from the preseason), and play it overseas in a neutral stadium. If they do that, it's obvious how to tweak the current rules for picking opponents -- the overseas game would be against a team from the opposing conference, presumably one that had the same rank in its division you did last season. So the schedules might wind up a little more non-parallel. By the way -- if they DO do this, I'd argue for Saturday games. The short week when added to the travel would hurt the quality of play, somewhat, but it would be the fairest, as teams would have an extra day to recover from the flights back.