Every now and then I read certain comments on other Star Wars related sites and this one caught my eye...
A fan wanted to expand on the EP VIII rumored cameo and this is what he said...Warning: Spoiler! (Click to show)
There are actually clues to this, and if it turns out to be a resurrection story, it will have been signposted in the earlier films. Anakin Skywalker turned from the Light with the promise of greater power, indeed the promise of fulfilling his own potential, the purpose of which was to cheat death. In Anakin's case, to save Padme. Darth Sidious sought this power seemingly to prolong his own life (it could be inferred he needed Anakin to achieve this), telling Anakin of Darth Plagueis' attempt at immortality. In the end, both Sidious and Vader were ruined by their fateful confrontations with the Light, and perhaps their abilities were restricted also. Ultimately, it was Qui-Gon Jinn's spirit that called from the afterlife. Yoda told Obi-Wan that he had new training to undertake from an old master. Ben told Vader '...cut me down, and I will become more powerful.' Qui-Gon, Obi-Wan, Yoda and finally Anakin himself achieved immortality of sorts with their ability to communicate from beyond.
Then there is the prophecy. Anakin was to bring balance. The Dark Side had eclipsed the Light, but Vader redeemed himself and killed the Dark Side's great exponent. With Anakin's death, it would seem the Force is no longer accessible. Perhaps, unable to channel the Force and to train new Jedi, Luke has retreated. Perhaps Luke is a crazy old wizard now, talking with ghosts. Talking to himself. Suddenly now, we have an awakening - without accessing spoilers, it is clear a new generation of Force users is present, neither Jedi nor Sith. With this in mind, and with Kylo Ren clearly driven by the memory and inspiration of Darth Vader, a return for Anakin Skywalker is not so fanciful. Perhaps the prophecy is unfulfilled.