There is definitely a resemblance between the actors playing Rey (Daisy Ridley of The Force Awakens) and Jyn Erso (Felicity Jones) the star of Rogue One – perhaps one done on purpose as rumors are flying saying Erso is Rey’s mother. This would make a nice connection between the standalone-Rogue One and the trilogy The Force Awakens has begun and give us some of the back story of Rey without a ton of flashbacks.
The other rumor is that Erso is the egnimatic Captain Plasma seen all too briefly in TFA (with filmed scenes reportedly cut from the final release).
Of course one doesn’t preclude the other and Erso could be both Rey’s mom and Plasma, though personally, I think that is way too shades of Vader that I hope they do NOT do.
What do you think? Do you want them to be related or Erso to be Plasma? What is your theory?