I just found that Soulcaliber IV will have guest characters. Darth Vader on the Playstation and Yoda on the Xbox. 
Just thought I’d share the good news.
That is cool news.
However respect as to go to the developers of Soul Caliber, because they are kings at taking characters and putting them in their games to get a lot more buzz than they deserve. I mean with soul caliber 2 the gamecube version had Link in it, just as they announced the cel shaded look for wind waker, and now they’ve got the star wars guys in a beat em up. Whoever came up with those ideas probably isn’t being paid enough.