Although The Omen franchise might seem complicated, watching The Omen movies in order perfectly aligned until 2024s prequel The First Omen. 2024s The First Omen is the latest addition to The Omen series. The Omen franchise began in 1976 with director Richard Donners seminal classic The Omen, which follows the story of an American diplomat who begins to fear that his son is secretly the Antichrist. The Omen was a box office hit, resulting in 1978s sequel Damien: Omen II.

https://screenrant.com/omen-movies-in-order-release-chronological/