I sincerely doubt that they'll bring back the Lloyd costume with a connection as flimsy as the character's main colour scheme. And RPGs are a broad enough field for it to be reasonable that there's another character from one coming.
I wanna believe that, but part of me has doubts
Heihachi’s costume came with a fighting game character - Ryu in 4 and Min Min in Ult
Gil - ... kinda funny sitch. I can’t recall if he came with Corrin or Bayonetta in 4 and I can’t see the common theme there but he returned with Steve in Ult cause they’ve got that exploration theme going on
Geno - came with a Square Enix character. Cloud in 4, Sephiroth in Ult. Not Hero cause that pack was 100% dedicated to Dragon Quest
now Lloyd. Lloyd’s kinda the odd man out cause his Mii wasn’t bundled with any characters in 4 - instead, he was dropped out of the blue with some standalone stage dlc iirc. So I wouldn’t know what could happen at this point unless one of the last two was a Namco character in general (I’d prefer KOS-MOS, both Namco and JRPG)
...unless, Lloyd will be the only Mii from 4 to be promoted to playable in Ult’s DLC. which I’m doubting big time
not to mention Heihachi and Geno supporters will be salty, like “why’s HE the exception??”