User blog comment:Bronzey/Details of apparent next ME2 DLC pack - "Arrival"/@comment-743796-20110223043041/@comment-730941-20110223114706

Possibly. I would tend to think it refers to a separate game entirely, especially given that she was asking for ideas for new military-esque weapons. My best guess is some sort of Mass Effect-universe military shooter in the vein of Call of Duty.