Now to begin with, this is all personal predictions and should not be taken as FACTUAL! These are just my personal predictions, thanks for respecting that and enjoy the article!
With that being said lets start off by listing the obvious. After marrying Sakura and having a daughter, Sasuke achieved his dream about reviving the Uchiha Clan. In our world if Sarada were to marry, then she would change her last name to the male’s name. In the Naruto verse, sometimes it has to do with Clans and accepting and entering a Clan’s name because of their reputation. Example, Naruto taking his mother’s last name instead of Minato’s. (Of course, there’s also the theory that Naruto was given Uzumaki because if he was given Namikaze as his last, then people would look for him since he was the Fourth Hokage’s son with the 9 tails inside of him).
So my point moving forward is, if Sarada was to marry and change her last name, then the Uchiha Clan name would still need to be saved for future generations. This is where the idea of Sakura and Sasuke having more kids come into play! I believe, Sasuke and Sakura will end up having another child in the future of the Boruto manga. And that child will be a boy, more specifically.
If they had a son, they can guarantee the Uchiha name can be held onto the next generation after theirs and Boruto’s. Say Sarada were to marry Boruto, since both Clans are scarce they would more than likely keep both of their last names and not change any. For their kids however, it would be very unclear as to what their last names would be.
As we get further into the main plot of the Boruto : Naruto Next Generations, we will understand where the next gen’s goal and heads are at. Once, we get an understanding or resolution to it, I believe Sasuke and Sakura will end of having that other child and have him either as the baby of the series, or have him grow up little by little. Just like what they did with Konohamaru, and what they’re doing somewhat with Himawari.
The Uchiha name would obviously be passed down and if you really think about it, if Sasuke wanted to revive the Clan then he would be making babies with Sakura every night as much as possible! So who is to say he will have more than two kids? There’s a chance he may end up with many as he tries to keep his clan alive.
Developing character creation and personality to each would take some time apart form the other members of the new Konoha squad, however Kishimoto can still focus on the story, but just remind us the audience and viewers that Sasuke and Sakura are reviving the Clan from not only having Sarada. Seeing as how right now, she is the lone successor to the family Clan.
I believe in the future after whatever the main plot that Kishimoto has in store for Boruto’s generation to take on, the series will end off with many more Uchiha around the village similar to how Hashirama wanted the Senju and Uchiha to live in harmony. Except, the Uchiha wont be segregated form the rest of the villagers!
It would be surprising as a turn of events for it all to end with how it all began, but then again it is Boruto’s story and it will be different. With Kishimoto and Ikemoto sorting out the manga and creating the content monthly, there will be enough to time to execute and establish a proper story without having to rush out a chapter every week!