Seems to me that they're setting Tyrion up to have the final say. Too many shots of him looking painfully conflicted in the past episode. Plus, he's been a universal fan favourite from the beginning - needs to end on a big high, rather than fade out as he's otherwise done over the past couple of seasons (or really since he offed his Dad).
Dany is clearly going to go Mad Queen (how can she not, really? They've pretty much killed off everyone she trusts; the North doesn't like her and loves Jon instead - and that's before they know about his parentage; and now she's two out of three dragons down).
Varys is going to try and stop her, but fail and get himself killed (incinerated most likely).
Jon is too conflicted, smitten and (frankly) weak to step in and stop her himself.
So I reckon it's going to come down to Tyrion - they're going to give him the opportunity to be a Queenslayer, and I think he's going to ultimately take it 'for the realm' (or he doesn't take it, and the whole of the past decade is a circle, that ends with a mad Targaeryan on the throne).
Then either Jamie or Arya is going to deal with Cersei.
So does that leave Jon on the throne? Not sure......they might just kill him off as well, leaving, what, Sansa? A vacuum?
Oh, and Cleganebowl is obviously 100% on. Next week, or the week after, but it's coming.