Modern!AU where Thorin remembers his past life, and so seeks out one John Watson who was formerly Bilbo Baggins. However John doesn’t remember any of this and Thorin’s overly aggressive and creepy-stalker attempts to convince John that they knew each other and were in love in a past life, fall terribly flat. And John Watson, not one to take being stalked by some nutter going on about past lives, eventually confronts Thorin.
Before I read the captions, I thought Thorin was Sebastian, but you know what? it still works. I would totally read that.
Seb/Thorin sees John through his scope at the pool, and plots, and convinces Jim to let him be the sniper for Reichenbach, because he knows he won’t actually hurt John. Then when Sherlock/Jim are out of the picture, he starts to stalk him.
I’d totally write this, but I haven’t seen the Hobbit series. I’d totally RP the crap out of this though, as John who doesn’t remember.