psypop, 70s psychedelic style poster of a "Stranger Things Odyssey" psychedelic 1970s pop art poster, vibrant Hawkins townscape with swirling portals, kaleidoscopic Upside Down elements, groovy retro bikes and walkie-talkies, intricate Demogorgon patterns, dream-like eerie atmosphere, "Stranger Things Odyssey" appears on the poster with bold, vintage typography in neon blues and reds, vivid contrasting colors, hypnotic supernatural vibes
