Used bifold, shutters or shutter doors as a headboard. I think I would make a wall box a few inches deep and create some extra, hidden storage. Maybe a jewelry organizer with pegs or hooks for hanging items and shelves for small containers.
Ava- may be better than the technique where you put the foot board accross the front of the bench, especially if the footboard doesn't have a flat top. DIY: turning a headboard and footboard into a bench. Makeover, Salvage, Upcycle, Recycle Furniture idea