A majestic great white shark superhero, clad in intricately ornate armor, stands proudly in the mythical city of Atlantis. The scene resembles a cinematic movie poster with anime and manga-style graphics, featuring vivid, bright colors. Surrounding the superhero are dynamic swirls of water and schools of vibrant fish, as dawn's first light illuminates the underwater cityscape with cinematic lighting. The atmosphere is joyous and celebratory, capturing the spirit of a hero ready to protect their realm. Designed for high-detail offset printing, the poster is in 8K HD CMYK resolution, maintaining an epic and fantastical tone.