Eobard Thawne, a.k.a. The Reverse-Flash, has been a thorn in Barry Allen's side for a while on The Flash TV show. After causing Barry the heartache of losing his mom, Thawne made it his life mission to make The Flash's life a living nightmare.
Reverse-Flash is not featured too much on The Flash anymore, showing up most recently on Legends Of Tomorrow - but has not stopped Mondo from creating an amazing Flash vs Reverse-Flash poster that they just showed off at San Diego Comic-Con. The poster features both characters racing towards one-another in a fitting mirror image. The Flash is upright while Reverse-Flash is upside down, with their yellow and red electricity streaking behind them.
Check out the poster below and catch The Flash when it premieres on The CW in October.