Board Thread:The Flash discussions/@comment-9346948-20170503000247/@comment-24152851-20170507023258

Some possible better clues could have been:
 * Barry picking up the Philosopher's Stone and displayed a talent at controlling his power.
 * if Barry went and found some of the same material that Savitar's armor was made from.
 * 2024 Barry having a personality closer to Savitar, comparable to Anakin's transition to Darth Vader.