User blog comment:Argorrath/Treyarch posts a message of zombies; possibly hinting to a DLC 4/@comment-50.98.245.163-20130731191828/@comment-50.98.245.163-20130801005232

I guess Darling would make more sense, but I think Melchett would have better quotes, most of them would be him coming up with ridiculous plans to defeat the hordes of zombies.