Board Thread:The Flash discussions/@comment-9346948-20170503000247/@comment-26266279-20170504010838

Quoting from The Dark Knight - "You either die a hero, or live long enough to see yourself become the villain"

so I guess Barry took the second route and changed to Savitar.

Interesting fact : They have always pointed us to the villain in the first episode of each season.

Season 1 - Harrison Wells goes to a secret room (time vault) with future newspaper

Season 2 - Zolomon's cameo masquerading as Jay

Season 3 - Eobard literally told us Barry is the villain!!!

Glad the who part is over now comes the WHY KILL YOUR OWN LOVER/FIANCEE/FUTURE WIFE??

Although its probably to make sure Barry goes down the darker path eventually turning him into Savitar.