10. Rey Will Be Revealed As A Skywalker
Is Luke really Rey's father?
There are certainly a lot of parallels between Luke and Rey from what we know so far. Both were left on desert planets in their youth. They have shared interests in staring wistfully at the horizon, riding red speeders and growing up without parents. And they both learned the ways of the Force in their first film, came into possession of Anakin Skywalkers lightsaber and faced off with a masked assailant of the Dark Side.
Plenty of fans want to believe that these parallels (and recurring motifs in John Williams score) mean that Rey is Lukes daughter. Or failing that, she could turn out to be daughter of Leia and therefore Lukes niece. Or maybe shes not related to any original trilogy characters and marks the start of a new Force-sensitive lineage.
In Episode VIII, Rian Johnson will surely shed some light on Reys origins on way or another. This could take the form of a dialogue explanation or even more Force vision flashback thingies like the one Rey had in Mazs basement upon touching the lightsaber.