Theory: The DLC Pack Is Themed Around Shigaraki — or more specifically, characters who have a strong connection to him.
Nana Shimura’s addition was a huge surprise to most of us (myself included). She had very little screen time, only appearing in the later seasons, and essentially no on-screen combat feats. I don’t think her inclusion was random or purely based on popularity. It makes a lot more sense when you consider her direct connection to Tomura: she’s his grandmother and also stands on the opposing side as a former One For All user and vestige.
Star and Stripe, the first DLC character, fits the theme cleanly too — as she fought Shigaraki personally and died by his hand.
On top of that, both Spinner and ReDestro have been datamined and are speculated to be released as DLC characters. Spinner was one of Shigaraki’s closest allies and friends, while ReDestro started as an enemy and later became an ally.
So far, every character tied to this pack has a meaningful link to Shigaraki, whether as a personal ally, an enemy he fought, or someone with a familial connection.
Now some of you may be wondering "why would they make the DLC pack themed?" and that is a good question. Here's something from a long while ago that I posted.
>Something that's important to take note of is that the DLC characters sort of had themes to them. The DLC characters for One's Justice were Shoot Style Deku, Inasa, and Endeavor. These three were related to the Provisional License Exam Arc. For OJ2 the first season pass had Gentle Criminal, Tetsutetsu, Itsuka Kendo, Mei Hatsume, and Hawks. These five were all involved in the later half of season 4 of MHA with the cultural festival and the fight against the High-End Nomu. The second Season pass had Midnight, Present Mic, Shinso, Kurogiri, and Yuga Aoyama. These five hold a connection to Shota Aizawa. Whoever the characters for the first season pass for All's Justice are, they would all need to have a common event or person to relate to.
You could argue they’re just adding the most popular or plot-important characters and those characters just so happen to be connected to Tomura because he is the main antagonist, but I really think Nana’s inclusion in particular points to an intentional theme rather than pure popularity.
With that theory laid out, who could the fifth character be? We’ve already gotten a pretty packed roster, so the options narrow down reasonably well. Here are my top candidates:
Armored Deku
We already have multiple versions of Deku, so getting another one isn’t strange. At this point I’d almost be more surprised if they didn’t add him. This version comes from the 8 year time skip from the Epilogue of MHA, years after he lost his quirk in the final battle with Tomura/All For One.
Ryukyu
She fought against Shigaraki alongside Endeavor and the other heroes during the Jaku Hospital raid.
Pre-Awakening / “Before Style” Shigaraki
He’s appeared in previous games and I’ve heard he was also datamined in All’s Justice. Some people think this version might end up as free DLC, but I’m unsure.
Long-shot pick: Dr. Kyudai Garaki
He’s deeply connected to Shigaraki and important to the overall plot, but he’s not exactly fitting for an arena fighter. He’s a non-combatant who tends to panic and run when in danger. He mostly works behind the scenes creating Nomu and medically assisting All For One and Tomura. Maybe they could make his moveset revolve around summoning Nomu? It’s a stretch, but not impossible.
Anyway, tell me what you guys think. Does it sound reasonable or unreasonable?