How awesome it would be if through a dream, teleportation, time machine, etc... the lone wanderer was taken back to the day/week/month of the great war in which you fight to stop the event from occurring (if it's even possible). Then once you stop it from happening, you jump back to your present day only to find that years later there was an even greater war that now makes all mutants/ghouls, etc... 50% more powerful. Okay, just saying something along these lines might be unique and bring some freshness to a game touting "game changing" epicness (yah I made that word up)!