User blog comment:Lupercalus/Savitar/@comment-3221148-20161205100929/@comment-3221148-20161207124213

Kaestal, I agree with you on Zolomon, but I was talking more about the fact that they always try to somehow adapt the big characters.

Reverse-Flash is Eobard Thawne, who's from the future and personally hates Barry.

Zoom is Hunter Zolomon, who's... an evil speedster. Who also tries to make Barry go faster (but for his own purposes).

Savitar is a guy with an unknown name who received powers through uncharacteristic, almost mystical means and was trapped in the Speed Force.