Cliffhanger.The actor will reprise his role of mountain climber Gabe Walker in the reboot, with Ric Roman Waugh (Greenland, Angel Has Fallen) on board as director.According to Variety, production is casting for a lead to headline the sequel’s ensemble cast, suggesting Stallone will be joined by others in his rescue efforts.The Cliffhanger follow-up is written by Mark Bianculli (Hunters), with Neal H. Moritz’s Original Film (Fast And Furious) serving as producers alongside Stallone’s Balboa Productions.“Growing up with the biggest action films of the ‘80s and ‘90s, working on many of them myself, Cliffhanger was by far one of my favourite spectacles,” Waugh said.