A few years ago a crossover project called War of the Independents was announced, featuring a wide variety of comic book characters from different publishers, including the Savage Dragon, Madman, Cerebus, ShadowHawk, Shi and many more (you can find a longer list here). Spearheaded by Dave Ryan, the project at one time was originally supposed to come out from Arcana in 2008.
It's been a few years since I've seen anything on the ambitious project, but it is still be alive -- Ryan has started a Kickstarter page to raise money for it. The page also reveals that the six-issue full-color comic is now being published by Red Anvil Comics and will debut at New York Comic Con in October.
You can check out more art from the series by visiting Ryan's Facebook page.