So according to moviepilot:

Right now, and through October 30th, he is accepting writing and drawing samples on Millarworld by aspiring writers and artists from all over. At the end of the submission period, he'll choose six writers and six artists and then pair them together to create short stories featuring Millar's own characters. Those stories will then be bundled together and published in the first ever "Annual Millarworld New Talent Showcase." All the proceeds from the book will go toward The Hero Initiative. Millar is remaining true to his word about wanting the people who work with him to get monetary compensation for their hard work. So each team will also be paid an industry page rate for their stories.

http://moviepilot.com/posts/2015/09/29/are-you-an-aspiring-comic-book-artist-mark-millar-is-looking-to-hire-you-3568242?lt_source=external,manual

There is a lot of talent on this site that would blow him away, so pass the word