Okay, so if you are a comic TPB collector like me, get ready for a slap in the face.  Devil's Due Publishing has been producing for quite some time now the G.I. Joe vs Transformers series and it's pretty far along now, too.  There are currently four story arcs in this continuity: I, II, III: The Art of War, and IV: Black Horizon.  Well, currently it doesn't look like they are planning on collecting Vol. IV into a TPB; instead they are releasing it in the Omnibus version.  Maybe this is because Vol. IV is only two issues long, but like I said, it doesn't look like there's gonna be a Vol. IV TPB.  Perhaps if they continue the series into a Vth volume they could collect IV into that, but it seems, in my own opinion, strange to release an Omnibus if the series wasn't completed.  All and all, here is the link to the Amazon page where you can preorder it for a little cheaper.  The Omnibus is set to be released on January 30th.