The idea just came to me. Some construx posters. Not paper posters but posters you can build. You could build characters, scenery, vehicles, and cities. For instance: Cortana, Chief, Locke, Noble Team members, Forge, Arbiter, Jerome, Atriox, Prophets, mongeese, warthogs, Jackrabbits etc. etc. etc.
It's perfect. Mega could sell the frames the exact size of the posters. I would totally build off of this idea.