I've thought about duplicating a 1930 Art Deco casting I have (with a horizontal stretch,) and doing a small marquee from wood. Basically stack wood profiles and glue together.
That could fit in the narrow space above my small theater's door.
I've had great success with hammered rattle can finishes in the past, and am putting that to work as a simple to do, featured finish.
Another thought is a digital movie poster lightbox. Black Friday hdtvs can be pretty darn cheap, and my version uses a mask panel. In it's simplest form, I simply run digital
artwork using the internal slideshow, straight off a usb jump drive. Often movies have numerous posters, and hdtv shows can have dozens of posters so I simply scroll artwork
in themed folders.