According to Deadline, the network is currently working on a drama series based on the Valiant graphic novel Dr. Mirage.
The project was previously announced by The CW as part of its 2016-17 TV season, with a script from Annabelle writer Gary Dauberman.
Along with the historical romance Reign, which ran for four seasons on The CW, McCarthy was one of the executive producers on the CBS supernatural drama The Ghost Whisperer.
Amidst its slew of DC superhero shows, collectively known as the Arrowverse, The CW has started to branch out.