[@DJAtomika ] This is entirely my bad, I didn't put two and two together whilst reading your CS, but in this cannon Megaton is still around. 

I should probably clarify this now; the lone Wandered is not a moustache twirling villain who is evil for the sake of being evil in Graveyard, he started out like his father and lost his way, gaining a very bleak world view in the process. 

He came to agree with President Eden's ideals, and believes that the Wasteland was beyond saving.