In the previous post, I mentioned that I thought Andy Lanning was trying to rally support for a Cosmic Avengers title and not necessarily hinting at something was already approved and being put together.
In an article at Comic Book Resources, Tom Brevoort talked about Cosmic Avengers. His quote seems to give weight to the idea that it's only something being suggested and not in the works currently.
"Clearly there's been a lot of chatter over the idea of "Cosmic Avengers" since we released that teaser from "Thanos Imperative," and in that case, if we were going to do an ongoing series around a Cosmic Avengers, I would need a very good reason for why that book exists and what defines it and makes it different from all of the other books that we have. And yet, we'd have to make it an Avengers book and not a Starmasters book or a "guys in space" book."