- Bronn is always in the game for himself.
- Bronn always chooses the winning side.
- Bronn has seen a fookin’ dragon.
Bronn knows which side is going to win and he has already made contact with his old BFF, Tyrion. Betraying Jamie, while knowing that eventually Tyrion will be the power on the winning side, would be a form of suicide.
I wouldn’t be surprised to see him show up at Dragonstone very soon.