https://www.pcgamer.com/arma-3-adding-new-singleplayer-scenario-this-year-planning-third-party-paid-for-dlc-next-year/

Bohemia Interactive has unveiled its plans for realistic military FPS Arma 3 over the rest of 2018, which include a new singleplayer scenario. The scenario, which will be out towards the end of the year, will be free for owners of the game's Apex expansion, and will "experiment with more open-world gameplay".

It's codenamed "Old Man" and it "serves as an epilogue to the story in Arma 3's 'The East Wind' and 'Apex Protocol' campaigns," Bohemia said. The developer's designers are still in the initial planning stage but "will start production very soon".