hph6203 said:
War between the living and the dead in purgatory and the babies act as a bridge between the worlds with some environmentalist flair thrown in.
OR....
The babies become clones of those they're attached too....so when people die in this world by fast aging (shows up in other trailers) their baby clone becomes them as an adult.
OR....
The babies can also become possessed by the PT's (there's baby dolls that appear to come to life)
OR....
This is also connected to Metal Gear Solid (remember The Sorrow in Snake Eater who had a persistent tear down his cheek? Notice all the tears in the trailers?)
OR....
This is connected to the PT teaser that was supposed to be a Silent Hill game before Konami kicked Hideo Kojima to the curb (one of the groups of bad guys in this are called PTs and the use of creepy babies coincides with the premature crying fetus baby in the sink in PT)
AND ALSO....
There's the whole "Strand Game" that Kojima productions trademarked earlier this year due to this being a whole new genre of game....
OR....
Who TF knows?