The Houston Texans, Detroit Lions, Cleveland Browns, and Jacksonville Jaguars have never been to a Super Bowl.
The Atlanta Falcons, Arizona Cardinals, San Diego Chargers, Carolina Panthers, Tennessee Titans, Cincinnati Bengals, Philadelphia Eagles, Minnesota Vikings, and Buffalo Bills have lost in their Super Bowl appearances.
Of these 13 teams that never hoisted the Lombardi Trophy, Arizona, Atlanta, Carolina, San Diego and Philadelphia all have legitimate potential to join the other 19 Super Bowl-winning teams in 2015. The remaining 8 teams all have question marks (some have a big question mark) at the quarterback position, and consequently a lessened chance of success.
As a favorite to win the NFC East in 2014, the Philadelphia Eagles have a slight edge over the other 4 teams that could possibly snag a championship. Although Atlanta and Carolina can win a lot of games, the New Orleans Saints will most likely take the NFC South, or slip into the playoffs as a wild card. Similarly, Arizona will be very competitive, but the Seattle Seahawks or the San Francisco 49ers will probably win the NFC West. San Diego could manage to secure a playoff spot, but the Denver Broncos should dominate the AFC West once again.
Should the Eagles win their division again this season, the NFC elite will surely provide some stiff competition and extremely exciting football games. The Green Bay Packers with a healthy Aaron Rodgers would immediately strike fear into all Eagles fans in a playoff scenario. However, a playoff-win over the Packers, 49ers or Seahawks could provide the ideal momentum to drive the Eagles all the way.
The Eagles had the 2nd-best offense in the entire NFL last season. If the defense and special teams can be at least 25% better in 2014 (50% better just seems unrealistic) the Philadelphia Eagles would be deserving of representing the NFC in Super Bowl XLIX.