Twisted Metal certainly has striking imagery and characters, but most players probably aren't getting hooked on the plot. But hey, maybe you are concerned with the fate of Sweet Tooth and his cadre of sociopaths, in which case you'll be pleased to know that game director David Jaffe has posted deleted endings to the game.
The first alternate ending on Jaffe's blog is presented without explanation. The second, he says he tried making himself with iMovie when the game was still finding its tone. He says it was him "taking the story line darker for both the M rating (because we now could go darker) and because it didn't seem like Tooth fans would be ok with him taking the 'noble' high road and walking away. It just didn't feel right for the world/character."