These sweet posters are part of the Hero and Villain series by Simon C. Page. They feature some well known rivalries: Luke Skywalker vs Darth Vader, Batman vs Penguin and Spiderman vs Green Goblin. I especially like the Batman and Spiderman posters which feature the foreground-background optical illusion.
Deviant Art user swinspeed has a way of creating captivating landscapes. Each one has an elegance and solitude about it. He makes great use of dark clouds and highly contrasting colors in many of his works, which creates an ominous yet epic feel.
"It was inspired by my love of fashion, style and amazing food. I wanted to take something we all crave and give it a luxury lift. This tasty, chic collection gives a high-end, glam aesthetic to our favorite breakfast treats."
Nick Pedersen's Sumeru is an amazing series depicting the road to becoming a Zen Master. Each illustration has intricate details and sharp contrasts that draw you into the Zen Master's journey. You can see more illustrations and info about this series at Nick's site.
Smug One is a British street artist who creates incredibly realistic yet highly stylized graffiti paintings. He creates some incredibly beautiful work of women, famous character portraits, and bizarre/humorous scenes. You can check out a large gallery of his work on Flickr.