“The remake of Black Flag will include upgraded gameplay mechanics and elements, not just a visual upgrade. The Black Flag remake is confirmed to be built on the upgraded Anvil Engine, which has been used since the first Assassin's Creed. The release of the Black Flag remake could be as early as November 2025, pending an official announcement after Assassin's Creed Shadows is released”.
Report: Assassin's Creed Black Flag Remake Will Be More Than a Visual Upgrade, New Systems Mentioned