8. Were Those Vaders Ashes?
This one is more up for debate than anything else, but it offers an intriguing possibility. When Kylo Ren is interrogating Rey (which initially would have yielded their connection, surely, if they're brother and sister), he removes his helmet to grotesquely prove his humanity. He then seems to slam it down into what looks like a pile of ashes. Given that he has Vader's helmet, could this ash - which he uses to draw power from to help his interrogations - what remains of Vader? It's certainly an intriguing prospect (even if you'd have to further question why the "good" Force ghost of Anakin hasn't shown up to tell him to chill out).