Well, here's my entry. I was inspired by ShiverMeSideways' entry to the last tune contest, where he tried his hand at chamber music. Accordingly, this is the first time I've ever tried my hand at symphonic rock, so please don't laugh too hard.
Unfortunately, it turned out more like a simplistic classical piece with too much brass, poor orchestration, some ninth chords and a drumbeat. Oh well...here goes anyway:
End of the Line
I don't have any particular "final bad guy" in mind, but I would imagine that this would fit the final battle with an evil mastermind in some sort of spy game. The middle section (starts out with mostly drums) is supposed to represent the actual fighting. At the very end, where the music pauses on the "nice" Bb major chord, the protagonist thinks he has won, and the battle is over. But as he exits stage right, you hear the final chords, and you see a faint sign of life from the bad guy, ensuring that he is alive to fight another day and pad the game publisher's pockets with another surefire hit sequel.

End of the Line
I don't have any particular "final bad guy" in mind, but I would imagine that this would fit the final battle with an evil mastermind in some sort of spy game. The middle section (starts out with mostly drums) is supposed to represent the actual fighting. At the very end, where the music pauses on the "nice" Bb major chord, the protagonist thinks he has won, and the battle is over. But as he exits stage right, you hear the final chords, and you see a faint sign of life from the bad guy, ensuring that he is alive to fight another day and pad the game publisher's pockets with another surefire hit sequel.