Does Flash season 3 remind anyone else of Macbeth?
Barry is desperately trying to prevent Savitar's prophecy (of someone, namely Iris, dying) from coming true. Macbeth is trying to prevent the prophecy of himself dying from coming true. The speed force is showing Barry the future, in a sense, just as the whiches show Macbeth the apparitions.
Don't feel bad if you didn't notice, the main reason I did was because Arrow already has the Oddysey connection.