Overview

• The Season 1 Justice League cameo is reworked to feature the DCU’s Justice Gang, with appearances tied to Superman, Supergirl, Mr. Terrific, Hawkgirl and Green Lantern/Guy Gardner.
• Frank Grillo’s Rick Flag Sr. continues across DCU projects, now heading A.R.G.U.S. in Peacemaker and reinforcing his role as a recurring connective figure.
• Episode 1 opens a portal-driven, alternate‑Earth storyline that links to the interdimensional rift referenced in Superman.
• The premiere layers in deep‑cut DC lore, including a Rainbow Creature Easter egg, signaling broader canon-building under DC Studios.
• James Gunn says HBO gave no pushback to an explicit orgy sequence, underscoring the show’s TV‑MA tone within the shared universe.