User blog comment:TheDoctor230/Prometheus Identity Clues/@comment-3221148-20161212111241

>" I believe that it is a reference to another Dr Alchemy called Mister Element."

Yes, but Geoff Johns didn't create Mister Element, nor was Alexander Petrov the first Element.

Albert Desmond had a "criminal" personality called Mister Element, and a "possessed" personality called Dr. Alchemy. It's all one guy.

Now, Desmond (who wasn't much of a villain himself and was eventually cured of his psychoses) had lots of successors on the mantles of both Alchemy and Element, Petrov among them.