Refer to this post in the "Epic" thread: http://www.weirdalforum.com/viewtopic.php?f=60&t=11126&p=802452#p802452...
...and to the very first spoiler in the spoiler thread: http://www.weirdalforum.com/viewtopic.php?p=795075#p795075
Tl;dr - "Epic" 9-min track does not have to be track meant for potential Super Bowl performance. I speculate that the Super Bowl track is the 6-minute song, and will style-parody the astronomical production value, randomness and/or multi-generational artist choices of recent SB halftime performances. I think this could work really well in the same way "Don't Download This Song" lampooned "We Are The World" charity songs.
Maybe this will be the song with the video financed by Funny or Die, the one with the marching band? Funny or Die gets all kinds of celebrities due to its being founded and run by Will Ferrell. Celebrities, along with a marching band, would seem congruous with a song and video mocking Super Bowl halftime shows.