The new Star Wars park is just a rumor fueled by the acquisition of LucasFilm. Disney had a longstanding partnership with LucasFilm before the acquisition. I think if they wanted to build a Star Wars themed area, they probably could have done it already. This would obviously make it easier though.
If they want to expand the Star Wars presence, they should just add a Star Wars area to Hollywood Studios. They could level the Streets of America, Muppet-Vision, Lights, Motor, Action, and the Backlot Tour. Wall that area off and use Star Tours as the entrance to a new Star Wars area. Streets of America is a waste of space except for the Osborne Lights at Christmas. The window to do anything cool and new with the Muppets has closed. Lights, Motor, Action and the Backlot Tour are unpopular attractions that take up a lot of space. It would add more action to that side of the park. Right now, the area with the Tower of Terror and Rockin' Rollercoaster is packed and the Animation area and Pixar Place are getting there. The rest is sparse.
I don't think "contemporary content" is a problem. Disney has tons of content they can work with in Disney World. Pixar has been huge for them, yet there are only 7 Pixar themed attractions in all four parks. There are two for the Toy Story trilogy, one for A Bug's Life, one for Monsters Inc, and three for Finding Nemo, and only the Toy Story ones and Living Seas with Nemo are actual rides. There's nothing representing the last 10 years of Pixar except Toy Story 3. They can't do Marvel attractions at Disney World due to their deal with Universal. They are building a Stark Expo section at Disneyland. I think they're doing some Marvel stuff at one of the parks in Japan.