My thoughts...
For me, I truly believe Rey is Luke's daughter. The upcoming film for Rogue One has me believing Luke and the lead female character eventually cross paths, fall in love and have a daughter (Rey). I'm thinking his wife later dies during the fall of Ben Solo and Luke buries her on that island where he is standing at the end of TFA. Feeling like he has lost control, Luke goes into hiding, wipes the mind of Rey and places her on Jakku for her safety.
As for Snoke, I recently read the theory from the German fan I'm sure most have already read. After reading the tie in for Snoke as Plagueis who has went into hiding while Palpatine had his reign and waiting for the right moment to return when both sides were at their weakest points, has me believing it whole events are probably accurate.
The beauty of the possibilities are awesome! I can't wait to find out more and I have a good feeling everything will tie in nicely.