Theme Poster Layout Design

Based on [XXX theme], automatically generate a collectible epic narrative poster: a large elegant silhouette of a human profile as the outer contour, with the silhouette interior spontaneously growing a complete worldbuilding, iconic scenes, character relationships, symbols, key architecture, creatures, props, and atmosphere that best fit the theme. The overall composition is not a simple collage, but an advanced silhouette contour-filling narrative synthesis with double-exposure-like association, yet leaning more toward a fusion of movie poster and dreamy watercolor illustration style; soft atmospheric perspective, light misty transitions, paper grain, edge splatter and brush marks, large areas of negative space, restrained and sophisticated layout, quiet, grand, sacred, nostalgic, poetic, and strongly legendary. Style, colors, scenes, and materials all automatically adapt to the theme; all elements must be strongly tied to the theme, instantly recognizable, no clutter, no forced collage, no templated backgrounds, no cheap fantasy assets. A dedicated signature 'WHY' must be naturally incorporated into the image as part of the poster design, positioned subtly but clearly — can be placed at the bottom left, bottom right, or near the title; the style must be unified with the overall layout, like the author's colophon or design stamp on a collectible poster; the signature font should be refined, restrained, and elegant, not too large, not disrupting the main composition, and not appear abrupt or cheap.