most unlikely according to power rankings

According to a least squares power rankings...

[fishcrow.com]

...here are the most unlikely Super Bowl teams in terms of their power relative to the power of the top team that season (e.g., the Titans were 11 points below the Rams in the 1999 power rankings):

2012 Ravens -10
2011 Giants -10
2008 Cardinals -11
2007 Giants -17
2003 Panthers -9
2001 Patriots -9
1999 Titans -11
1996 Patriots -10
1991 Bills -13
1985 Patriots -10
1979 Rams -12.5
1975 Cowboys -10
1970 Colts -15