A thought occurred to me recently.....what if James, the father of the Lone Wanderer is still alive?!?!?
He caused that radiation spike that supposedly killed him, but Colonel Autumn survived, or was revived. Chances are....the Enclave would've possibly had more use for James elsewhere, so they revived him....but they took him somewhere else, and the Lone Wanderer and the others simply have no clue that he could be indeed still alive.
This is just a theory, I mean if Colonel Autumn could survive that, and later the Lone Wanderer.....what reason James couldn't have survived it too?
If it is true, then perhaps there is plans to have him have some other role in a future Fallout game?