A cinematic sci-fi anime movie poster of a heavily armored cylindrical deep-sea submarine on a rocky ocean floor. The sub features a glowing cyan central viewport, a ring of smaller lights, two bright downward spotlights, and "NEREIS-01" painted on its side. Behind it looms a colossal bioluminescent anemone-like entity with radiating tentacles tipped with cyan lights. The dark teal abyss features glowing seabed flora. Top left text includes the Japanese title "深淵の地平線", the subtitle "ABYSS HORIZON", and the tagline "暗黒は、終わりじゃない。人類の新しい始まりだ。". Small technical footer text reads "INTERNATIONAL DEEP SEA TREATY ORGANIZATION" on the bottom left and "IDTO-AB-013300-ALPHA" on the bottom right. Highly detailed, dramatic lighting, industrial mecha design.
