If you haven't seen the Avengers movie, stop what you are doing right now and go see it. If you have seen it, then go ahead and enjoy these tributes to The Avengers that were showcased at Gallery 1988. If you are lucky you might find a piece that you like for sale.
If you are a comic book lover, then you'll love this series of prints by Danny Haas. Haas gives a side by side comparison of super heroes with their secret identities. Loving the grunge looks and colors and minimalist character outlines. You can get the art prints at Society6. If you like these, you might also like Super Heroes Painted by Arian Noveir.
I'm really digging Arian Noveir's series Super Heroes Painted. Arian captures the essence of each character with some well placed paint splatters and shapes. Each one has a great unique look, but also fits in well with the series as a whole. The paintings look minimalist, but give away enough details to clearly see who the character is. If you like these, you can get the prints on Society6.