User blog comment:Damac1214/Call of Duty: Ghosts receiving more Character Packs on March 4th/@comment-3964768-20140302021804/@comment-1187559-20140302031222

I have a feeling Treyarch don't mind small cameos, like Lev beign in a cutscene, and their logo as an emblem. But I think when it comes down to full on character skins Treyarch will likely say no. Even though they're both owned by Acti, they likely both have their own copyrights on things.