Yes, Dany's goal has been the Iron Throne — nothing less seems to satisfy her. It's her way of breaking the wheel, as she once said. What remains to be seen is how she processes Jon's revelation about his parentage: would she sacrifice herself for his and the world's sake? We also don't know what Jon thinks about it. Will he feel a duty to fulfill his destiny (assuming he survives), or will he say that he doesn't want to be king and essentially abdicate the responsibility to Aunt Dany, who is next in line? I think he was about to tell her when they were interrupted by the horns signaling the white walkers' arrival.
I suspect we'll see one or more major characters bite the dust next time, but there will be three episodes after that, so this isn't yet the battle to end all battles. And, judging by what was shown in the S8 trailer and by several pronouncements about the safety of the Winterfell crypts, I can't imagine that things will go well down there.
Although I'm sad that GoT will be ending, I believe it's the right time to bring the story to a close. I prefer to see series finish their run on top rather than overstaying their welcome. I'm hoping that the prequel will be just as good.
It seems like the logical end for this series.
For the entire 7 book series (2 yet to be published) although a journey for a group of characters, the story seems to be centered on the Iron Throne, with the knowledge that it was a Targaryen who united 6 of the 7 Independent Kingdoms, the 7th through a marriage alliance with Dorne.
Daenerys journey, although she has been in the story from the beginning, the theme was not apparent from the start, which has been to take the throne back (her brother was the one, until he proved unworthy) she feels was stolen from her father, The Mad King. So I’ll be very disappointed if she were not to survive for the final conflict with Cersei Lannister.
And I admit, I’ll be very disappointed if Cersei wins, but honestly who knows with this author? One of several curve ball endings, It could be Gendry who ends up on the Iron Throne with Ayra as his Queen. But it would be a shame if Dragons were not in the final picture, but then you could ask, how would they stay in the picture?
It has been mentioned that the sex of Daenerys’s dragons are unknown, but it is suspect they can change sex, and it’s possible that her 2 dragons could reproduce, if they survive, maybe they are not subject to the same genetic diversity needs that other animals have to produce healthy offspring.
Also, I’m not clear on exactly who can master dragons.
Blood of the dragon is referenced by Daenerys and her brother, the ability of their family to withstand fire, as possibly related to the ability to domesticate dragons, but also related to their Valyrian ancestry, yet they were 1 of 40 dragonlord families. So, my guess is they don’t necessarily have a lock on dragon riding.
https://awoiaf.westeros.org/index.php/House_Targaryen