I think this is a fantastic idea -- not only would it allow some respect to be restored to champion, but it could be a great vehicle for universe-building, with new characters, locations, artifacts, races, etc popping up in each issue.
Galactus, at least to give him some kind of credit back.
Id like it to focus on his role/encounters with the likes of Eternity/Death and the Living Tribunal etc instead of the constant jobbing and involvement with events/earth heroes.
Guardians of the Galaxy should just continue from where it left off pre- Thanos Imperative.
I'd like to see a Tim Drake/Dick Grayson duo book, as there's a lot of fun to be had with that dynamic (Fabien Nicieza had some OYL flashbacks of the two of them in his Robin run, it was pretty cool). Same kinda idea could apply for Steph/Cassie, as it seems unlikely either will gain a solo as Spoiler / Blackbat...