I disagree. One of the frequent complaints about SCIV, even from people who reviewed the game, was that the StarWars characters ruined the aesthetics of the game. If you played Vader, Yoda, or the Apprentice vs another StarWars character, especially within the StarWars stages, it wouldn't look like a SoulCalibur game at all. It'd be a StarWars fighter. Hell, Project Soul even said they were out of place. Guests like Link, Kratos, and Ezio were far more appropriate, because their designs and fighting styles fit in with SoulCalibur's time periods and aesthetics. StarWars's inclusion felt like an experimentation and a way to market The Force Unleashed (and it wasn't subtle about it).