Ideas on/Guessing Fallout 4's plot.

I'd be interested to hear what people think the plot is going to entail before we all get a chance to play the game ourselves.

I'm calling the plot twist right now. Your character is android. Given that you are in Boston, there have been mentions of the "Institute" in F3 and NV, and you somehow survive for 200 years and don't age a day.

What're your thoughts?