What? Why do you all want her to be Luke's daughter? It's too much of a coincidence. Plus she says that she thought Luke was a myth. She's a new character, what's the problem with that. It's a big galaxy, why make it smaller.
They could go with the whole idea that the Force is guiding these characters together, but that would be ****. Let me say that again, ****. It would be the worst thing they could do to this new trilogy.
I really hope it's NOT his daughter and she's unrelated to anyone. What's next - Finn being Lando' son, Captain Phasma being Rey's mum?!? Not as ridiculous as Darth Vader building C-3PO...