User blog comment:TheDoctor230/Barry Allen Is Savitar/@comment-24152851-20170409113430

That's actually the second most popular theory at the moment, with the most popular being "Wally is Savitar". I'm alright with this theory, but there's a few things that don't add about it.

Firstly what could Future Barry possibly have to gain from harassing Present Barry? And what could possibly lead Future Barry to kill his own wife Iris? Also, Savitar said that in the future, Barry trapped him in the Speed Force. Does that mean another future Barry from a different point in the timeline trapped himself in the Speed Force?

Having said that, I'd find it cool if Future Barry did turn out to be Savitar. We'll just have to wait and see.