Only Obi Wan and Rey have British accents. Could that be a clue?
There's a scene where Rey persuades a Stormtrooper to open her cell door and drop his weapon, and it kinda echoes Obi Wan's signature abilities.
Does this not remind you of Obi Wan when he was traveling the halls of the Death Star, disabling the tractor beam and more?
She hears Obi Wan's voice at the end of the lightsaber vision flash scene, and her loneliness is likely referencing Obi Wan's lonely hermit status.
Of course, there are more questions here than answers. Like, when the hell did Obi Wan get married? Or did he do so? Aren't Jedis monks that aren't suppose to get attached?
Is the old guy from the beginning her father? Uncle? Something like that?
Very sound and solid theory. And also a very interesting one. It is a must read. Check it out here.