I think you get what this topic is about, but I'll explain it:
Will the prototype Big Daddy resemble? A Rosie, a Bouncer, a Slowpro, or something completely new?
Slowpro is a Big Daddy originally planned for BioShock 1, but removed late in production *Click Here to see Screenshot of it*
And before anyone mentions the picture in GameInformer, it says next it "This is just a placeholder design." AKA until they've modeled out the new Big Daddy, they were using the old Rosie model for the interview.
Edit: The "new" gameplay footage you see is NOT new, it's the same shown to GameInformer, which GameInformer screenshotted for their magazine. As such, it's STILL THE PLACEHOLDER. Anyone still claiming as such should be directed to this topic post.