User blog comment:Thegamingknight4272/Professor Zoom/@comment-3221148-20170224162018

As for the nickname of "Professor Zoom", I'd imagine it could be used by some successor of Zooz on Earth Two. Heck, Harry had some hints that he knows way more about the Speed Force and time travel than he lets on, but it'd be strange to bring him into an antagonistic role against Barry.