Yes I remember in 2013 there being a lot of talk about adding Cars Land to WDW. Most of us here at Disneyland didn't like the idea because WDW already has so many things that we don't have here and Cars Land was our special thing that people came to Disneyland for. California Adventure needed Cars Land, it was failing and was about to become a failed theme park. We were afraid that if WDW got a Cars Land, then there wouldn't be a big need to come to California Adventure for it because WDW has so much to offer, people would choose that Cars Land over ours and then California Adventure would be back to square one. So maybe they decided to let DCA be the only one with a Cars Land, for now. In 2013 Cars Land had only been there a year, so adding it to WDW then seemed too quick.
Disney works quick when they are adding new things to the parks and I'm sure they want to get Star Wars Land open as soon as possible. Cars Land is 12 acres and it took 3 years to do, so if they got started now, it could be done by 2018, but they probably won't start until next year.
"The past can hurt, but the way I see it, you can either run from it or learn from it." - Rafiki
"You must not let anyone define your limits because of where you come from, your only limit is your soul." - Gusteau (Ratatouille)