In the newest solicitations for May, there is an obvious gap where the cosmic titles should be. In place of Nova and Guardians of the Galaxy, we are introduced to the next cosmic event called The Thanos Imperative!
On a number of message boards, there has been speculation (and some borderline panic!) that the two titles are being cancelled. Personally, I think it's way too early to jump to conclusions.
Is it a simple hiatus for the books while TTI is going on or is it a sign of massive upheaval? We simply don't know what's going on at this point.
There's also a rumor that Nova will be joining the new Secret Avengers title by Ed Brubaker. If true, that would be awesome (imo)! I enjoy Ed's work very much and think he'd have a great take on Nova. As long as the current Nova title continues, I'll be one happy dude.
I expect Marvel will make some announcements in the next few weeks about the cosmic books. I do know there are big changes coming but how big and what shape they'll take, we'll just have to wait and see.