Writer Ed Brubaker is featured in CBR's "Talk To The Hat," a regularly featured column with Marvel Senior Vice President of Publishing, Tom Brevoort.
Getting right to it, Brubaker was asked about using Nova in Secret Avengers:
So, let's dig into what some of the readers had to ask Ed about. First off, BrownShken wodnered, "Did you have bigger plans for Nova when you originally cast him in the book? Did his fate in 'The Thanos Imperative' change your plans or did you always know you would only have him for the one arc?"
Brubaker: A little bit of both. I thought we might have him for longer, and then the Thanos stuff came up where we learned they were going to kill him. So I said, "Can I kill him in my book, instead?" but Tom said no. [Laughs] But I knew before I even wrote issue #1 that I only had him for that one arc, we just had to keep it a secret. Like the team.
There you have it.
Ed also speaks on Captain America, Fear Itself, more on Secret Avengers and also on his "Fear Itself" prologue, Fear Itself: Book of The Skull (on sale in March) over at CBR.