Well, first off, I usually go with the random BS getting closer to game time, but I'll step back from that here.
The Bulldogs and the Chupacabras have been in this league since season 4 and both teams year in and year out are very, very competitive.
Both teams have made the playoffs each year. Both teams have had their ups and downs. Both teams have made adjustments throughout the course of the year. Both teams have had a great year. Both teams have proved themselves each year. Both teams have good, active owners and GM's. Both teams game plan for their opponent. Both teams take time out to focus on their tactics. Both teams are moving up to 'AA' next year. Both teams are in the championship game. Both teams are fighting for the avatar trophy on the home page. Both teams are fighting for 'A #5' Supremacy. Both teams had very tough schedules against formidable opponents.
However, only one team can win the game.
IMHO, the first team to make a single mistake in this game will be the team that loses.