I hope it's not just a new uninspired map for horde or turret mode. If it's a new mission without the Pathogen and more Aliens, I might get it if it's paid DLC.
Weird they're going with that instead of the planet side colony missions they teased. On their twitter they teased that something big is in the works. So if it's just a map for horde mode, there's probably something bigger in the works still.
It's really sad they haven't announced a Season 2 or anything important yet for the game...