Design a dramatic movie poster for the film "The Abyss Between Us." The poster should convey the intense emotional conflict between the two brothers, with a strong focus on the theme of division. In the center, show a deep chasm splitting the poster vertically, symbolizing the growing rift between them. On one side of the chasm, depict the brother who became a police officer, dressed in his uniform, standing firmly with a stern expression. On the opposite side, show the other brother as an activist, holding a protest sign, with a look of determination. The background should feature a cityscape in turmoil, with smoke rising and crowds gathering, highlighting the social unrest. The title "The Abyss Between Us" should be displayed across the top in a bold, impactful font, with the tagline: "Blood may bind us, but beliefs divide us." The overall color scheme should use contrasting tones to emphasize the conflict, with dark, moody lighting to enhance the drama.