Game Of Thrones Season 7 Finale: Predicting Who Lives & Who Dies
6. Bronn

Where He'll Be
King's Landing (presumably after a brief stint in High Garden alongside Jaime, judging by the trailer). He'll likely be by Jaime's side at the Dragonpit if he makes it past that first "battle" (where not a great deal of fighting will happen by the look of it), trying to avoid Cersei's gaze.
Verdict: Dies
Bronn and Jaime changing allegiance sounds like the best possible outcome, but sadly for Bronn, he's already in Cersei's cross-hairs after helping Tyrion meet with Jaime under the Red Keep earlier this season. If she doesn't have a plan to punish Jaime by killing him, it will be a shock.
He deserves to survive the entire thing and get his castle, but it all seems set up for him to die.
5. Brienne

Where She'll Be
Down at the Dragonpit after Sansa sent her to answer Cersei's summons. Coincidentally, she seems to get there at the same time as Jon Snow and joins his party, as the trailer confirms.
Verdict: Lives
Having been badly sidelined this season (because there was very little for her to do with her tied to the Stark sisters rather irresistibly), Brienne deserves to be given a starring role in the action-heavy final season. And that surely means that she will come out of whatever happens at the Dragonpit unscathed - especially as it would be too lovely to see her brought face to face with Melisandre in the near future.
She could die in the pit, because she's another who could be vaguely classed as expendable now, but it would be too cruel an end to her season, surely?