Passage: Although the character of Xander Cage was supposedly killed in the sequel to explain his absence, Vin Diesel announced in 2006 that he would be returning as Xander Cage in a sequel, entitled XXX: The Return of Xander Cage. Initially, not only Diesel was set to return, but also the director of XXX, Rob Cohen. Diesel has said that the style and music will also be similar to that of the original film, more of what the fans want, with an emphasis on extreme stunts and with a heavy metal soundtrack. Joe Roth was in talks to produce. According to Cohen, he has also approached Sony, and "now we're writing a script with the guys who wrote Terminator 3 and Terminator Salvation. So we'll do another Xander Cage XXX. We'll bring it up to speed a bit and bring back the extreme sports guy who's drafted to be a spy." On June 10, 2009, Cohen dropped out of the production, instead moving to direct the action film Medieval. On August 26, 2009, SlashFilm announced that Ericson Core would be directing and production would start in early 2010.In April 2010, it was revealed that the third film would be financed by Paramount Pictures instead of Sony, and would also be shot in 3D. Meanwhile, Rob Cohen had returned as director. Vin Diesel will produce, among others, while Gloria S. Borders, Scott Hemming, Ric Kidney and Vince Totino will serve as executive producers.

Question: Who else was initially set to return besides Vin Diesel?
Rob Cohen