While I did really like what we did with Ashes across three years, I also could see gamers benefiting from a side campaign that runs for just one calendar year. For example, a 2015-only Eberron campaign with deep story, 9 adventures total releasing in chapters of 3, available first at cons and then for stores, at the end of the year sold through DnDClassics. It could serve three purposes: give an option to gamers who want something else or who want more, provide a taste of a different setting, and leave behind playable content that supports that setting for the edition.
I like the sounds of this.