Photo manipulation to create dramatic effect

"Hi. My holiday project is a report on 'The History & Significance of the Red Square'. I'm pretty much done — just looking for something dramatic to do on the back cover (and humour is allowed). I have a few pictures of the Red Sqaure, and one of how it might look hundreds of years from now... Would you place a larger-than-life fictional character like Spiderman climbing up the towers, or Superman landing on the scene..."