The project is being developed in-house before being shopped to studios.

Archer & Armstrong first appeared in a series of the same name in 1992, created by former Marvel editor-in-chief Jim Shooter, Wolverine: Weapon X writer/artist Barry Windsor-Smith and fan-favorite creator Bob Layton. The series centers around the unlikely friendship between Armstrong, an immortal warrior who has become a drunken self-styled philosopher throughout the centuries, and Archer, a teenage prodigy who has been trained since childhood to murder him.

News of Rossio and Fleischer's involvement in the project, which is separate from the five-picture deal Valiant has with Sony, follows the announcement of Dave Wilson — creative partner of Deadpool director Tim Miller — as director of the company's Bloodshot at Sony, working from a screenplay by Arrival's Eric Heisserer.

Additionally, Valiant is developing another buddy comedy project, Quantum & Woody, for television with Joe and Anthony Russo as executive producers. (Andrew Barrer & Gabriel Ferrari, currently working on Marvel's Ant-Man and the Wasp, will script the pilot.)

Rossio is represented by WME, with Fleischer represented by CAA.