There are four characters that would be amazing candidates for the two remaining slots, in my personal opinion.
These four would be Viola, ZWEI, Setsuka and Kamikirimusi. If any of these four characters make it into the two slots, I’d be more than happy, but another guest character is probably likely because it’s been a while already since Haohmaru was released. If they do another guest, my wish is that they add Scorpion from Mortal Kombat. He’d fit right in, but I won’t go in depth on that.
I would also like to see some more options on game modes, like tag team, or even Endless mode. Two versus Two matches would be a very interesting mode in SoulCalibur. More bosses in the game would be amazing too, just to spice things up and have some more challenges.
As for Creation, all I really want is some more options, which I’m sure they’ll make much more, and maybe bring back the Devil Jin style that was used in SoulCalibur V.