As of 2021, Super Bowl XX remains the last Super Bowl to feature two teams both making their first appearance in the game. It was the fourth overall following Super Bowl I, Super Bowl III, and Super Bowl XVI. Absent further expansion of the NFL, any future Super Bowl that would have such a combination would have to have the Detroit Lions playing either the Cleveland Browns, Houston Texans, or Jacksonville Jaguars in the game. All 16 NFC teams have played in an NFL championship game (Detroit last made an NFL championship game in the pre-merger era); only the three AFC franchises that began play since 1995 (the technicalities of the Browns franchise relocating means this version began in 1999) have yet to reach a league championship game.