Here are a few ideas for poster illustrations I made. My idea is to make minimal illustrations of the deaths and interesting moments from the interstitials. We can make 4 posters, Howards death with the baguette, Rosemary's death on the floor, Knight's death with the stake and maybe one poster of the Butler with the mask.
forefathersgroup.com Vintage meets modern design - classy, period savvy and fun.
aboard-entrepreneurship.com/ - another clean, elegant retro design.
Here's a post on Retro Style in Web Design.
Here's a guide to make retro web design, it's a bit trivialized but seems like a good place to start
Here's a collection of 1920s style fonts.
