I'm starting to think that Savitar is actually Flash from the future. Notice that he keeps saying the line "I am the future Flash," so maybe this is the writers rubbing in our faces, and it's said that he was the first speedster ever born, and that could apply to Barry, possibly. The story about future Flash imprisoning him could've been lies, like how "Jay" lied about his speed in season two. They could very well be going down the route of blue Flash from the comics.