With the latest legend of korra comic coming this 26th of July, I can't help but wonder if we'll get to meet other descendants of the old gaang particularly Sokka, Suki and Zuko's. We all saw Aang, and Toph's in the show, Fire lord izumi's daughter was originally supposed to be in season 4 and be paired with Mako but was held back due to financial reasons. And I'm pretty much hoping we'll get to see them if not in turf wars then perhaps in future lok comics.
I'm also hoping if we'll get to see the Fire nation again several decades after the war.
I'd say it's more likely then not that they do, and we will. I have a headcanon that Izumi has a younger brother, named Taiyo, and he may kids as well.
Now, in the show, they probably aren't very much at all like how I imagine them, lol, but I'd say they exist. We are definetely seeing the Fire Nation at some point, hopefully in Turf Wars, so we can be optimistic! Izumi's daughter as well.
Sokka and Suki is an interesting one. I heard a thought that one or more of them could have been the SWT chief, but they were kicked/tricked out by Unalaq, and the others did nothing about it. This lead to estrangement, basically, much worse then the Kya Bumi Tenzin situation. I think that could be very interesting, though I doubt we'll see it in Turf Wars. The next one, hopefully.
And I'll just say it: I like Suki, but I hope she's dead. It would feel sort of meh and convenient if of the main Gaang apart from Aang and Sokka were alive. But half and half is perfect.
I honestly think that the less we see of Azula, the happier I'll be. She was always one of those characters I utterly despised.
Objectively, as an antagonist in the series, she was brilliant. But as an individual and as a character, I hate her, so I would be perfectly fine if after S&S we never see her again. (I was quite disappointed with S&S's conclusion overall, but that is an entirely separate conversation)