I recently picked up the Art Of Star Wars The Force Awakens book, and in it concept artist Iain Mccaig explains how he proposed the idea of having the Force Ghost of Anakin Skywalker appear in Episode VII! I think that this idea may still be forming and we may actually see this come true in Episode 8. Rumors have been circulating over the last few months that the stunt team that worked on Force Awakens is also training Hayden Christensen who portrayed Anakin Skywalker in the prequels. I have taken some screenshots of the Anakin ghost pages from the book, check them out:
This quote is very interesting to me as i believe it is insinuating that Luke communs with the force ghost of Anakin. I think he actually did in the time he spent on that island before Rey finds him, it would make sense.
Now this is the more interesting information on the concept of Anakin’s force ghost. It seems as if when Anakin died, he did not fully go completely light in the force. They explain how Anakin would flow back and forth between both Anakin Skywalker and Darth Vader. I am speculating that in Episode 8, we will see Anakin talking to Kylo Ren as Darth Vader, and talking to Rey as Anakin Skywalker. This concept is to good not to use. I am sure in the coming months we will find out if Hayden truly has been cast in Episode VIII, but until that time, speculate away! You can pick up the book on Amazon.Com or wherever books are sold!