User blog comment:Kaestal/My theory of Savitar being the Arrowverse version of Cobalt Blue (And therefore Eddie Thawne)/@comment-27700324-20170413215805/@comment-3423279-20170414000239

Right, I'm not saying he has a good reason, I'm just saying based on the minimal clues we've been given Eddie Thawne being Savitar makes the most sense.

And considering Savitar described being in the speed force as almost losing his mind multiple times.....