Empire= r2, jedi=yoda, rebel=emporor... What will sith give?

Hummm.... Yeah, that lightsaber call was really a mistery... How can she be connected to the Skywalker blood if she's not a relative to any Skywalker? I see your point.

BUT! Han heard Rey's story about been left on that planet (actually i don't remember if he did heard), he also was there when she was "called" by Luke's lightsaber (that i remember)... I think if she was his lost daughter, that would be the ultimate clue, because even if they can't recognize her, they still know they've lost a child 20 years ago and it was a girl... I mean, they should, right?

UNLESS, they thought that child was dead. That could be it. But i find hard that Leia wouldn't sense something like that, or that Han wouldn't connect the dots about her having connections to the Skywalker blood and his lost child (assuming he knew there was a lost child)

But, as you said, we gotta wait to see...