ComiXology, Amazon's online comic book service, unveiled a new unlimited content subscription option on Tuesday. The $6 per month ComiXology Unlimited plan gives subscribers unfettered access to the service's archive, which includes titles from Image, Dark Horse, IDW and a bunch more -- basically every notable publisher outside of Marvel and DC. ComiXology will continue to sell individual issues from the Big Two, it just won't offer them on the unlimited plan.