supernatural speculation

Speculation ahoy! Spoilers only through "Salvation" - no season finale spoilers wanted or needed here!

I just rewatched "Salvation" with Alex, and had a couple of theories pop into my head. Things to ponder during the long (sob) hiatus ahead of us ...

( any show that starts with its own songvid just cannot get any more awesome )

In other news, Dean. ::flails:: ... that's all.