There are plenty of excellent theories around regarding the parentage of Rey, the new hope in Star Wars Episode VII, and I will now throw my hat into the ring: I believe Rey's father is actually Luke Skywalker's close friend and skilled X-Wing pilot Wedge Antilles.
From the movie, it is clear that Rey believes there is a pilot inside her - and absolutely proves that to be the case with the thrilling Millennium Falcon chase sequence on Jakku (the highlight of the movie for me) - and she treasures one of her few possessions, the X-Wing pilot helmet.
The character of Wedge Antilles is significant enough in Star Wars canon - having survived the destruction of the first Death Star, featured heavily in the battle on Hoth, leading the Red Squadron during the attack on the second death star, all whilst becoming Luke's good friend - whilst beneath the radar just enough (pun intended) as to not be immediately obvious and/or clichéd as Luke or Han being Rey's father.
As for Rey being taken from her parents at a young age, could she have been a Padawan at the new Jedi academy created by Luke - later destroyed by the Kylo Ren (and possibly the other Knights of Ren) - and was put into hiding by Luke himself on a planet not so different to his home planet of Tatooine?
Or... Rey was immaculately conceived - like Anakin - and Disney will have trolled us all.