It looks like we have a Ork Codex cover leak now, and its a nice one. Definitely an Ork Warboss thats not one to mess with. I am hoping that this is it, because it really would be a good cover. Just a heads up.... the pic above is not the leak. I do have links though.
Please remember that this is a rumored cover leak.
Here is the link. posted by Rubs
http://www.dakkadakka.com/dakkaforum/posts/list/660/585556.page