The CW could soon be adding a second spinoff from Arrow.

During his time at the Television Critics Association's winter press tour, CW president Mark Pedowitz said the network is already in discussions about expanding the Arrow and Flash universe. While he declined to provide any additional details on just what that would look like, Arrow executive producer Greg Berlanti helped clarify when asked directly if the potential addition could be based on Arrow recurring player Brandon Routh's DC character Atom/aka Ray Palmer.

Read more CW President Eyes More DC Comics Fare, Plans Big Summer Expansion

In the DC Comics, The Atom can shrink down to a subatomic size, with Arrow marking one of the only times the character has appeared in a live-action series.

"We're in very early talks in a very general idea that we haven't gone deeper on yet," Berlanti told reporters, with Routh noting he would like to continue with the role.

"When [the Arrow role] was proposed, I was hesitant to step into DC world again,” Routh said. The actor first donned Superman's cape in 2006's Superman Returns.

Pedowitz, whose schedule is lined with three DC shows in Arrow spinoff Flash and an adaptation of iZombie, noted that there's "room for a lot of things" on his schedule and that genre is clearly working for the network. (Freshman The Flash, already renewed for a second season, ranks as The CW's most-watched series.)

Added Berlanti about the network's expanding universe: "We just love this universe and we want to keep growing it," he told THR. "We are trying to do more of what we enjoy, and it's true: the shows are so plentiful with characters and storylines. There's a region of the universe that we felt like we haven't dealt with yet that we'd like to deal with."

Email: Lesley.Goldberg@THR.com

Twitter: @Snoodit