I keep going back to the idea of Monaca finally coming back from outer space and ending up being invited to be a student at the new Hope's Peak Academy.
All of the Warriors of Hope would be invited and would be there, maybe, not just Monaca, but she's the most wary of it. (DR3 implies the other four were helping Komaru and Toko, so maybe they've still kept in touch. Monaca, meanwhile, is both Monaca and has been living her best life in outer space, far away from everyone and everything. Except television, which DR3 implies she somehow still has.)
But like. They're all radically different.
Jataro's still some sort of Ultimate Art because that's the best way he knows to express himself, but he's all willowy and thin and never wears his mask anymore and his hair's kind of long. He's kind of a pretty boy, the exact opposite of himself.
Masaru's maybe the Ultimate Pickpocket because it's all a game to him. Sometimes he gives stuff back, and sometimes he doesn't. But he likes the running, likes the chase. He's not a hero anymore, not a leader, but he's still a little bit Peter Pan, and he never wants to grow up.
Nagisa's maybe the Ultimate Manger - not like Nekomaru because he's not into sports, but corporate positions. He's good at arranging people, good at scheduling, good at making businesses better and more effective. He's best at knowing when people need to take time off, when to let them rest and take a break, and because he's so good at his job, the corporations tend to listen to him. His hair's grown long and bushy, like a fluffy cat's tail, and it's always kept back in a ponytail. At some point in the past several years, he's gotten glasses, and while he knows he's good at his job, he's grown more shrunk into it.
Kotoko, meanwhile, has gone full tilt into her fighter class and become the Ultimate Boxer. She hates gentle, hates it, and having something else to beat up, to rough up, to punch has been a healthy way for her to get all of that negative energy out. (I like to think she and Komaru took a self-defense class together, and she liked it so much she kept going with it.) All of her hair has been chopped short, and she has the band-aid on the side of her face that Masaru used to have across his nose. But it's still a cutesy band-aid; she still loves adorable things. (In fact, it's probably the same bunny-covered band-aid that Junko used on the Steering Committee member.)
And Monaca, herself, is also something other, something different, but she's not necessarily better. She's spent all that time alone and away from everyone and everything. I don't know what her Ultimate might be, but they call her the Ultimate Space Case as a joke. And she still knows just what buttons to push to rile everyone up.
Hope's Peak isn't what it was either, so we get to see what Makoto's done with it. It still focuses primarily on the growth of its Ultimates, but it's more about giving them a safe space to continue to pursue their passions while also making sure they get a well-rounded education. There are other students, too, Talentless ones, but they're not treated any different from the Ultimates. In fact, sometimes the Ultimates are asked to teach on their passions, if they want, and Talentless students go and learn intricate stuff from them to get better at stuff they like. (Kotoko teaches a self-defense class primarily for girls; Masaru is not allowed to teach pick-pocketing, but sometimes he does anyway.)
And then, of course, because it's Danganronpa, they somehow find themselves locked in the school and Monokuma shows up to start a Killing Game.
The Warriors of Hope immediately pull a DR2 vs. Nagito bit and tie Monaca up and leave her in one of the rooms because obviously it's her. Everything was good and fine until she showed up, and no one wanted to emulate Junko as much as she did, and she's still kind of a bitch, and no one knows what she's been up to in space, maybe she's been planning this for years!
Except it's not Monaca and Monaca desperately wants to figure out who it is because she's pissed off. How dare whoever this is use Big Sis Junko's legacy this way? (Yes, she still loves Junko. The other Warriors still do, too, but they've got a bit of better perspective on her. She could be good to them and still be a horrible person. It can be complicated. There's no such it can be complicated with Monaca.)
And Monokuma comes to Monaca all tied up and talks with her a bit. Asks her what she would do if it actually was Junko. Which Monaca refuses to believe because Junko is dead, Junko has been dead for years at this point, there's no way she's coming back, no way she's alive. But Monokuma plants enough of a seed of doubt that she's left unsure.
Then the story proceeds from there.
I like to think Monokuma untied Monaca. That would give her a lot of extra suspicion from the Warriors, especially if she's honest and says Monokuma did it. She wants to be honest because that's the only way people will believe her, and maybe Komaru and Makoto do, when she says she's not involved, but Kyoko holds off because she's all investigation mode and the Warriors absolutely refuse, absolutely are certain this is her fault, because it's always her fault. And if she's telling the truth, then she's obviously in cahoots with Monokuma because he's helping her! Also who is the one who still has Monokuma servants? Just Monaca. She has to be doing it!
Excepting that this Monokuma is clearly not Towa City design. Toko has seen them both - the ones Monaca used and the one Junko used - up close and personal - and they're not the same. Monaca's are mass-produced copies of the original, and they're servants. Junko's was an exquisitely designed one-of-a-kind original (she had more than one, but there's no Monokumas like Junko's Monokumas). And these are Junko's Monokumas.
Which leads to concern for the Remnants. Whether they've reverted, whether they're involved somehow. And maybe they're able to contact them (or maybe one of them is there with them, too), and nothing points in that direction either.
Despite being dead, I think Junko's still involved somehow. Because it's always Junko, at the end. And because the idea of Monaca specifically having a reunion with some form of Junko is just. a very strong pull here. Of a Junko who can look at Monaca and say she's proud of her and who she's become, who maybe can look at the other Warriors and say the same, although that's less important. (The other Warriors would not want her to be proud of them. Monaca still does.)
Anyway, these are the thoughts. Idk if I'll ever actually long form write the thing (between the Warriors of Hope, Makoto, Kyoko, Komaru, Toko, and maybe a Remnant, that's 10. I don't know who the other six would be, unless I rope in Hiro and/or Hina (who could be teachers at Hope's Peak) and/or more Remnants (which I like less). No Byakuya, although I feel like he's been taking Nagisa under his wing. And while it'd be interesting to rope in new characters, new Ultimates, I don't want to "clearly these don't have plot armor but everyone from canon does" you know? So. That's a thing.)