I have been studying NFL databases for quite some time since I got my ass handed to me last year. Here are some stats for super bowl winners and runner-ups the following year, since 1984-85 superbowl ended:
If you bet blind every game against SUPER BOWL LOSER laying -3 or more ats: (bet against runner up getting +3 or more) 136-97 58.3%
If you bet blind on every game against BOTH winner and loser, when they lay 3 or more: (so you take +3 or more against them, regular season)
305-250 54.95%
more stats to follow.
If you bet blind every game against SUPER BOWL LOSER laying -3 or more ats: (bet against runner up getting +3 or more) 136-97 58.3%
If you bet blind on every game against BOTH winner and loser, when they lay 3 or more: (so you take +3 or more against them, regular season)
305-250 54.95%
more stats to follow.