Comic pack Flash was done several years ago, before the Comic Pack Group Project. There are a few Original 13 characters that Hasbro hasn't made (Grandslam) and a few that didn't work for me (Flash, Clutch, and Steeler).
Originally I was going to use a large piece of posterboard to do a curved background, with a flat piece of acetate on the front with the comic info. However, it would have been too large. Using plywood did the trick, however I didn't compensate for the upward angle needed for photos, and the walls are not tall enough in the back, but I fixed this with a piece of foam core for the photographs. The explosions, clouds, and comic info were printed on card stock and cut out. The explosions in the sky and Hawk are suspended with clear styrene rods. Hawk also has fishing line holding him in place. The comic info was spray glued to the inside face of the plexiglass.