Jim Kellys Bills have been to 4 consecutive Super Bowls losing then all.
Buffalo - 1990, 1991, 1992, 1993
Nobody has ever gone to 4 consecutive Super Bowls and won 3. If the Pats pulled that off they would stand alone and also tie Pittsburgh winning 4 Super Bowls in 6 seasons.
NE - 2014, (2015 Denver), 2016, 2017 (L),2108 and 2019 ????
Pitt - 1974. 1975, (1976 Oakland), (1977 Dallas), 1978 and 1979
NE would also tie Pittsburgh winning back to back championships twice.
Pitt (1974,1975) (1978,1979)
NE (2003, 2004) (2018,2019)
The Pats have already tied Dallas winning 3 Super Bowls in 4 seasons.
NE - 2001, (2002 Tampa), 2003 and 2004
Dallas - 1992, 1993, (1994 SF) and 1995