HEroes Convention

I'm getting myself all set up to go to HEroes COnvention and I'm setting upa sketchbook for the show and I'm trying to figure out which piece would make a great cover for the sketchbook. It has a mixture of hero art as well as fantasy and horror work, so it might be a bit all over the place but I like it. I'm debating whether it shiould be a simple black snd white or a color cover. Something that I can pilfer from some older work or if I should use something brand spankng new. If so, what kind of image....