A majestic great white shark superhero adorned in elaborate and ornate armor stands heroically in the vibrant cityscape of Atlantis. The backdrop features a sweeping underwater vista teeming with colorful fish, with the soft light of dawn casting a magical glow over the scene. The artwork is in the style of a cinematic movie poster, blending elements of anime and manga graphics with striking bright colors. The image is rendered in high detail with offset printing in mind, capturing a sense of joy and excitement through cinematic lighting. The poster is crafted in 8K HD quality, using a CMYK color palette, exuding a sense of epic adventure and heroism against the dramatic underwater city setting.