Spoilery, Thinky Thoughts

I really shouldn't speculate, but these big DW finales become an intricate puzzle, don't they, and none more so than this. You start putting together all the little tidbits you've come across in interviews and spoilers and finding a theory that fits it all. So here is mine - if you are avoiding the trailers for next week or, of course, Part One, read ahead at your own risk:( It can't get any worse, can it? )