In Backstroke of the West both Darth Plauges and R2-D2 share the name Reach The Man. The only logical conclusion we can come to is that R2-D2 is Supreme Leader Snoke. This perfectly explains why R2-D2 only wakes up after Snoke realises that he cannot otherwise find his way to Luke Skywalker. Also notice how Kylo Ren says that the First Order has the other half of the map. ..just like R2-D2 does. This cannot be a coincidence. Also going back to Backstroke of the West, when Speaker D tells Allah Gold about the the tragedy of Reach the Man he states that his land killed him to let him go to bed. This is important because ass we know Sith cannot become Force Ghosts, so obviously his only option was to upload himself to a machine body. Notice how we never see Snoke in person. That is because he does not actually have a physical body, it is only a hologram projection created by the real Supreme Leader Snoke; R2-D2.
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