Board Thread:The Flash discussions/@comment-9346948-20170426001441/@comment-27700324-20170428031029

Stryzzar wrote: Actually scratch what I said before, they do seem to make it look like he's Ronnie. It would make sense since Ronnie was sucked into the singularity and had an uncertain doom. Robbie Ammel was teased to have a return and all we got was a crummy Speed Force ghost, so this could be his true return. Being in the Speed Force would explain why he became a speedster. It'd also explain why Savitar never seems to want to hurt Caitlin.

Only thing that doesn't add up is why is he after Barry and Iris? Did he go insane and became a villain, at which point Flash had him trapped in the Speed Force? Well he could just be the Speed Force like my theory is and that he is just the very first speedster under orders from the speed force and therefore can take on any form just like the speed force did.