DC Ultimate Universe

Arrow S1 -> Arrow S2 -> Arrow S3 + The Flash S1 (The Flash 1x08 -> Arrow 3x08) -> Arrow S4 + The Flash S2 + Supergirl S1 + Legends of Tomorrow S1 (The Flash 2x08 -> Arrow 4x08) -> Arrow S5 + The Flash S3 + Supergirl S2 + Legends of Tomorrow S2 (Supergirl 2x08 -> The Flash 3x08 -> Arrow 5x08 -> Legends 2x07) -> Arrow S6 + The Flash S4 + Supergirl S3 + Legends S3 + Black Lightning S1 (Supergirl 3x08 -> Arrow 6x08 -> The Flash 4x08 -> Legends 3x08) -> Arrow S7 + The Flash S5 + Supergirl S4 + Legends S4 + Black Lightning S2 (The Flash 5x09 -> Arrow 7x09 -> Supergirl 4x09) -> Arrow S8 + The Flash S6 + Supergirl S5 + Batwoman S1 + Legends S5 + Black Lightning S3 (Supergirl 5x09 -> Batwoman 1x09 -> The Flash 6x09 -> Arrow 8x08 -> Legends of Tomorrow 5x01 (special))

/ Season 2 -> after Superman (2025)