Six years after the launch of the PS5 and Xbox Series X, Call of Duty may once again be releasing across both current and last-generation consoles simultaneously. Prominent Call of Duty leaker Alaix has reported that early versions of Modern Warfare 4 are being playtested on PlayStation 4, strongly suggesting that Activision and Infinity Ward intend to bring the 2026 entry to PS4 and Xbox One alongside the current-gen versions. The franchise has consistently supported last-gen hardware with each annual release, and the PS4 and Xbox One still maintain large enough installed bases globally to make the commercial case for continued support, particularly in markets where console upgrade cycles lag behind North America and Europe.

The continued last-gen support comes with a well-documented trade-off. Modern Warfare 4's multiplayer has already been described in leaks as a near-complete copy of Modern Warfare 2's gameplay rather than a significant upgrade, a design direction that aligns with the need to keep the game functional on hardware that is now approaching a decade old. Developing for the limitations of PS4 and Xbox One inevitably constrains what current-gen versions can achieve, as the lowest common hardware denominator sets a ceiling on the technical ambition of the entire project. Activision and Infinity Ward have not officially confirmed the game's title, platform lineup, or release date, though an October 2026 launch window has been consistently cited in leaks alongside a setting on the Korean peninsula and a story continuing from Modern Warfare 3 centered on Makarov and the Konni Group.