Hey, as long as Vaughn isnt related to Sydney, I can handle anything they do here!
Thoughts:
Irina knows Vaughn's "covert" issues. I assume she knows who he has worked/does work for, because Irina knows everything!!! Irina gave Vaughn her blessing to marry Sydney. That tells me a lot right there. I can trust Irina if she says she blesses their getting married. Clearly, Vaughn is still bitter about her killing his father, because just like every other time they speak to one another, he brings it up again.
Vaughn was so pissed and devistated about Lauren being a double agent. It does not seem in keeping with his character for him to be one too, or he'd have just been angry that he'd been doublecrossed or something when he found out about Lauren.
It would definitely seem that he has been/is a bad guy, but for whom? Some group way before Covenant, if this goes back to when the show started. Does it matter if it was from KGB or something? Or would it matter more if it were a more recent double agent thing like working for Irina or Yelena or Sark or whomever?
It seems from the way he spoke to Sydney, that he wanted to make sure there were no secrets. It does not seem like he would expect her to flee screaming from his presence when she found out the secret, know what I mean? So while Im sure its a big thing, I dont know that it is a total dealbreaker for the S/V shipper thing.
I mean, we'd all up and quit watching if they spend another whole damn season getting together. Im all for bumps in the road on the way to the wedding/elopement since they cant just do the happily ever after thing on Alias, but to taunt people from 4 straight seasons and then make Vaughn her half brother or something. Nope. J.J. is not cruel.
But I dont know what J.J.'s thinkin, either.
Looking forward to a summer/fall full of theories and commentary though! What a great cliffhanger!