On his blog Chris Ryall has announced IDW will be publishing an omnibus of the entire first series of Marvel Star Trek comics, minus the first three issues which were an adaptation of The Motion Picture which are being saved for an adaptations omnibus along side IDW's new Wrath of Khan adaptation. Zach Howard will be producing the cover for this book, which looks like this (see the pencilled version in the original post):
Howard will also be making the cover for the Early Voyages omnibus which Ryall confirmed in his posting.
Ryall also revealed in the comments of this posting, that the Wrath of Khan adaptation will be released biweekly, in June and July. With the omnibus due in the winter.