I think that bringing in all three dragons would result in a lot of friendly fire. Unridden dragons are great for destroying ships when the only ships around are enemy ships, but unless they are directed, they will just go to town.
I think that this sets up a total isolation for Ciersi at the end of the season... Jaime and Dickon get house arrest in Casterly Rock and High Garden, respectively. The Dothrakis relieve the siege at High Garden, and maybe the extra dragons destroy Eurion’s ships. Edmuir takes over the Twins and marches from the Northwest... I would like to see Bronn take some shock troops to the dungeons to rescue his beloved from Dorne (and her mom) and have the Dornish army coming from the South. Maybe he also rescues the Septa and she starts an internal protest. Cool beans!
"Dickon"
Bronn: LOLOL!
Well...his beloved...the last of the Sand Snakes is dead.
My prediction is that when next we get to see the dungeon where Ellaria Sand was chained up to watch her daughter die, we will see that she has escaped.
The next time we'll see her is when she finally dispatches Cersei Lannister. As gruesomely as possible I hope.
She could seek an alliance with the Night King. Somewhere in the books is mention of a legend of the Night King, thousands of years ago, consorting with a living woman. (I don't remember the details and whether it was consensual or a kidnapping.) If I recall correctly, it was a very brief mention and was not developed. Nor has it been foreshadowed in the show. That probably makes it an outside shot, but it's within the realm of GRRM's magical universe.
Adding: Do you recall when Yara led a raid on Ramsey’s castle to set Theon free, only he was too brainwashed to go with her?
Foreshadows Theon pulling the same stunt at King’s Landing to Free Yara and gain back some redemption.
Isn't that chick dead with mom watching her decompose?