User blog comment:Damac1214/Black Ops II Getting New Personalization Packs on Tuesday, March 4th/@comment-3967954-20140227221941/@comment-1187559-20140228040643

In all honesty, I wouldn't put too much stock into the fact they found old files from past games in the files. A lot of Call of Duty's often have a lot of legacy files in them. I believe Modern Warfare 3 has a few Call of Duty 4 weapon icons in there, and World at War even has some Call of Duty 4 files in them.