For the people who cannot get their minds off Virtual Breasts ad Star Wars.

Soul Calibur 4 will make an appearance on the PS3 and Xbox 360 on July 29th. Just like Soul Calibur 2 it will feature playable characters from a different universe. Yoda and Darth Vador (Wonder Why they didn't just called him Master Vader?) will both make an appearance on each console. Yoda on the 360 and Darth Vader on the PS3.

Both games will feature a Variety of Characters and Online play. However no Cross over between PS3 and 360 is planned as of yet. Which means that Yoda will never battle Darth Vador. 

No release date has been released for Europe yet but it probably won't be more than a few months from now after the release of the US Version.

Source