User blog comment:Kir the Wizard/The Clues for Savitar/@comment-27700324-20170309205056/@comment-3221148-20170309210720

"Did we?" implies that he was on Team Flash when the Brahmastra was thrown into the Speed Force.

Anyway, I did not want a mystery on Savitar's ID, but since it's going to be a plot point in, we might as well start discussing it for real.