The Jets and Colts play this week. Those teams once squared off in a Super Bowl, and they also spent many years playing against each other in the same division. What other two Super Bowls featured two teams that at some point (not in the Super Bowl year) were in the same division? Hint: The Giants-Ravens played in a Super Bowl, and the Ravens actually started as the Browns (who were once in the same division with the Giants), but NFL record-keeping considers the Ravens and Browns to be separate, so that's not a correct answer.
The Steelers and Cardinals were both in the "Century" Division in the '60s, and the Buccaneers began their NFL tenure in the AFC West (playing against the Raiders).