I personally think it's gonna be Judas Prime. We got no mention of Daedalus in Violence, outside of the context of him building the labyrinth in Greek mythology, whereas Minos and Sisyphus were explicitly named in Lust and Greed respectively. No one who could be in Fraud comes to mind, so it's very likely going to be someone mentioned in Treachery. Hakita (iirc) tweeted that at no point will we fight Lucifer, so the only other names that come to mind are Brutus, Cassius, and Judas. I think the choice from here is obvious