When Annihilation came out that was the greatest resurgence the Marvel Cosmic characters had seen in a long while. To be fair, the Nova Corps wasn't featured much anyway, so them being destroyed didn't upset the balance of really any other character than Rider.
Even though I loved the Guardians of the Galaxy movie, one thing I didn't like was that the Nova Corps was reduced to a rather mundane everyday police force. I didn't like the design of the helmets I saw on the Nova Corps, and it sure didn't look like any of these guys would be flying through space unaided any time soon. So it's too bad we wouldn't be seeing a real Nova appearance in the MCU, but I guess I see why they did it.
I made this one in Daz Studio (armor pieces modeled in Blender), then did the rendering in Blender using Cycles.