Been thinking about what will happen in this season's Dr Who finale, by which I mean both this week and next. Not sure I'd risk many predictions, because predicting is always going to be a mix of "what I hope will happen/what I'd do," "what I dread will happen cos I don't trust the crew to x, y, or z," and "what I think will actually happen." All coloured by "what they *want* us to think will happen, by spouting hyperbolic bollocks."
But I'll go for a few of the categories:
What I'd do/hope: All this Cyber-stuff will inspire Missy to go back to 2014 and set up the Third Way arc (between the Doctor's way and the Master's way). We'd get an explanation of how and why she chose to put the ad in the shop window that led Clara to the Doctor (though I actually think that's more likely in the Xmas special, if it ever happens). I'd be tempted to make the Simm Master actually a fake, played by the Doctor in a test to see whether she had really reformed. I'd also be tempted to make Bill's Earth Mondas - or at least the London we saw in Beneath The Ice, so that the change in history is what enabled Mondasian technology to get ahead of Earth's.
What I dread will happen: Basically a repetition of half the stuff that happens in Dark Water/Death In Heaven - convert a companion, kill the companion but know it'll be undone two episodes later, etc. A repeat of the Time Of The Doctor Doc-ages-to-regeneration-in-one-episode thing (see below). It all being a Matrix style simulation tying back to the Monks in Extremis.
What I think will actually happen: The First Doctor will appear in some form. Whether recast as David Bradley (according to many Xmas Special rumours_, David Warner (according to a few other rumours), or simply a CG-coloured cameo like in Name Of The Doctor. I say this because, you know, Mondas - if it's still around 2017, then its timeline has been fucked with and so the Doctor didn't regenerate when it attacked Earth in 1986. With the black hole relativistic eeffects mentioned in the trailer, I wouldn't be too surprised to see a repeat of the aged-hundred-of-years Doctor we got in The Sound Of Drums and Time Of The Doctor either. (I wonder if Capaldi could be made up to play the First Doctor - he took the role at the same age as Hartnell, after all) And of course the Master and black holes have never ended well...
What I think they want us to think: Bill dies.
What would actually surprise me (in a good way). Um... Bill is Susan? Maybe? Dunno - I'm hoping that any pleasant surprises are... pleasant surprises. I'd settle for it making logical self-consistent sense, and tying in with earlier episodes logically and consistently.