According to a 2K employee's LinkedIn profile, BioShock Infinite's upcoming DLC may feature a new AI companion, reports Eurogamer.
A line in the employee's CV, which has now been removed, referred to his role of "providing animation and R&D for a new AI companion character" in the game.
Despite having my own issues with BioShock Infinite, I feel as though Irrational really did a great job of bringing Elizabeth to life, so I'd be excited for any upcoming DLC featuring a different AI companion. That said, it's probably not worth getting your hopes up at this stage — "AI companion" could mean anything. It could just be a new, different type of vigor. Who knows?
BioShock Infinite DLC to feature a new companion [Eurogamer]