A formidable great white shark superhero clad in intricate, ornate armor stands heroically in the vibrant, underwater city of Atlantis. The scene captures a cinematic movie poster style, with swirling water and colorful fish surrounding the central figure. The backdrop features the ethereal beauty of dawn, casting a gentle glow over the city's gleaming spires. Rendered in stunning anime and manga graphics, the image showcases vivid, bright colors with offset printing effects. High detail and a sense of joy permeate the scene, enhanced by cinematic lighting. The poster is designed in 8K resolution and CMYK color mode, evoking an epic, heroic atmosphere.