So, on this site : http://www.coverbrowser.com/ , which is brilliant and which you should browse for hours on end, there is a little game where you have to fill in the speech bubbles of vintage comic books covers : http://www.coverbrowser.com/bubbler

And seeing how I've got nothing better to do, I'm willing to see what you can come up with.
I'm attaching a crappy example to get you going.