Honestly, the only reason I was considering guests is because of how similar the season pass for this game is compared to Tekken 7’s Season Pass 1. I mean you have a returning character as a bonus (Tira/Eliza) followed by a guest character with their own stage (2B, Geese). I wouldn’t be surprised if the last 2 slots were also guests, and a Season Pass 2 with legacy/new original characters was planned in the future.
With that said I hope Hilde and Zwei are possible returning characters, Tira’s inclusion confirms they are rewriting the canon as they go for this timeline. And even though Aeon is basically bootleg Kratos (he has some of Kratos’s moves from Broken Destiny) he’s still welcome since’s he not a clone of Sophitia anymore.