Arrow writer Wendy Mericle will be promoted to the role of "co-showrunner," presumably to help take some of the burden off the shoulders of producers now also running The Flash, Supergirl and the as-yet-untitled Arrow/The Flash spinoff series.

The announcement came from Arrow and Vixen showrunner Marc Guggenheim, who introduced Mericle to Twitter today.

Please welcome current Arrow Co-EP and future Arrow Co-Showrunner @MericlesHappen to Twitter!!! #theregoestheneighborhood — Marc Guggenheim (@mguggenheim) April 23, 2015

Mericle has written or co-written 13 episodes of Arrow to date, including "Darkness on the Edge of Town" and last night's "The Fallen."