Other Championship Rematches.

[Manning4MVP]

2007 - Detroit Red Wings defeated the Pittsburgh Penguins in the Stanley Cup
2008 - Pittsburgh Penguins defeated the Detroit Red Wings the following season in the Stanley Cup.

2008 - Boston Celtics defeated the LA Lakers in the NBA Championship
2010 - LA Lakers defeated the Celtics in the NBA Championship.

1975 - Pittsburgh Steelers defeat the Dallas Cowboys to win Superbowl X
1979 - Pittsburgh Steelers defeat the Dallas Cowboys again to win Superbowl XIII
1996 - Dallas Cowboys defeat Pittsburgh Steelers in 3rd meeting to win Superbowl XXX

1992 & 1993 - Dallas Cowboys defeat the Buffalo Bills in both Superbowls (XXVII & XXVIII)

Any other you guys know of feel free to add.

[Voldamort]

Needed to add the baseball teams

[Manning4MVP]

1977 & 1978 Yankees defeat the LA Dodgers in the World Series.

1996 & 1999 Yankees defeat the Atlanta Braves in the World Series.

many more are Yankees rematches.

[SweetZombieJesus]

Yankees-dodgers. Aside from the golden era I think in 77-78 the yanks beat the dodgers and in 81 the dodgers beat the yanks.