Previous Post I know very little this character. Supposedly he is Barry's long lost evil twin Malcolm Thawne AND Professor Zoom's ancestor. Did that bit ever get retconned away? (seems kind of soap opera-ish being the long lost evil twin) Should we expect to see Malcolm on the TV series?

I don't think it was ever explicitly retconned, but outside of Mark Waid's writing, I don't believe Malcolm (or Colbalt Blue) have ever been mentioned again.

Unless the writers of the TV show really loved the "Chained Lightning" arc, I doubt we'll see any hint of Barry having a twin brother.