Worth1000 hosts a variety of photo-editing and illustrative contests. One of their contest series, Superhero ModRen, challenges users to incorporate superheroes into fine art pieces.
The gallery includes quite a few images - some well done, some not quite so, but all inspired. Some of my favorites:
"Wonder Woman" by FlashDaz
"Rembrandt vs Joker" by Valgio
Justice League? by Briman222
I particularly like the Escher image. However... if I had the skill and ability to do something like this, I would have had Elijah Snow holding the globe, with Jakita Wagner and Ambrose Chase in the background.
Sigh. I would love to see a Planetary movie. Unfortunately, though, it's a D.C. property, so it's probably best left off the big screen until such time (if ever) they learn how to produce a decent movie.