wtf is the deal with sansa and theon? didn't it show just ground below them? it seemed like suicide.. really not sure wtf that was all about, people say their future is 'uncertain' and there was nothing for them to land on, unless I'm mistaken.
about myrcella, I suppose she will die but the ship was still nearby and I doubt Jamie will not realize this was Ellaria's work.. I suppose next season they go back to either get the antidote and save myrcella or she dies and they just sail back to butcher Ellaria.
as for Stannis, since Brienne and Podrick didn't see the candle and since this show is not afraid to show our favourite characters butchered in various ways, I believe we'll see her take that swing against the tree behind Stannis in the last second and she will actually take him to the Boltons and request a trade, him for Sansa. either way though, unless some kind of magical aid comes to the rescue of Stannis he is either dead due to Brienne or will die at the hands of the Boltons in a trade. I suppose they will butcher Brienne too