Well, hey. Sam and Dean had both played the role of 'hunter from the future' in their parents' lives. Was it any big surprise that someone else's kid--or even one of theirs, supposing they ever had kids--might come back from the future too? Not really. Personally, Sam thought it would be hilarious if, say, Ben Braeden came back and kicked Dean's ass. His brother could be such a putz sometimes when it came to feelings and his favorite boybands.
Even so, Sam couldn't help but wince as things just kept getting more and more complicated. "We're obviously dealing with things way, way above our paygrade," he said, trying to stifle a groan. "As usual."