User blog comment:Metroidzard/Infinite Multiplayer Rumours/@comment-5154803-20120813050129/@comment-5154803-20120827044312

I wasn't refering to Elizabeth and Booker. I was thinking along the lines of new playable chracters just for the co op. Gameplay wise it could be either be a full on seperate story or tiny spec op missions. But after all that thinking I thought how it would be dumb to add another story mode.