One of my favorite concept art blogs is Parkablogs.com and the guy who runs the site has an amazing collection of art books. Recently he reviewed the book Marvel's Ant-Man: The Art of the Movie and shared a video with pictures of some wonderful artwork. It's not the entire book of course, but it's very impressive. The book isn't available in the U.S. until August 4, but the book is available in Asia. They show alternate looks of Ant-Man (Paul Rudd), Yellowjacket (Corey Stoll) and even Wasp (Evangeline Lilly). While we don't know exactly who created the artwork, the majority look like the work of Ryan Meinerding, Charlie Wen, Jackson Sze and Andy Park.
Ryan Meinerding is Marvel Studios Head of Visual Development who's worked on superhero movies like Captain America: The First Avenger, Thor and Iron Man. Andy Park is a professional concept illustrator who's worked on movies like Marvel's the The Avengers (2012). Charlie Wen is a professional concept artist who's worked on movies like Thor: The Dark World. Jackson Sze is a senior illustrator at Marvel Studios who's helped contribute artwork for films like Guardians of the Galaxy (2014).
Click on the images to enlarge.