My work here is done!
I also suspect ep 9 will be titled Rey-turn of the Jedi.
EDIT: Can Rey be a Skywalker? Yes.
Way back when Anakin Skywalker went off in a huff over something ObiWan said, got absolutely blasted on speeder fuel, had a drunken shag with an equally blasted woman, nine months later, with the Empire ruling the galaxy the woman kept her newborn very, very quiet.
That kid in turn had a kid thus Rey.