Capture an 8k uhd image of a squirrel striking a heroic pose as batman, adorned in a sleek black costume, set against the backdrop of a city in ruins under a menacing stormy sky. The scene should convey a dramatic yet whimsical atmosphere, with the soft lighting enhancing the texture and detail, as if shot on a high-quality DSLR camera like the Fujifilm XT3. Subtle film grain should be present, adding a cinematic touch to the overall high-quality image.