So with the chris pratt as Indiana jones rumor gaining more traction , perhaps a new attraction would be good co marketing.
If they bring over the existing Indiana ride from japan it shouldn't take them that long to build the ride or to demo the current stage. So they could have it up in a year or so. That would bring something new for the park while a larger starwars portion is built.
Looking at the map
http://wdwtourguide.com/img/DisneysHollywoodStudiosMap.jpg they could easily fit a cantina where the current Indiana food area is , they could also put up a dark ride Indiana and perhaps another dark starwars ride in the current stunt show space. Then they have that space around commissary and echo that can be themed for more star wars .
Looking at backlot they can fit a few rides over there and put Pixar there. They should be able to fit cars land and a roller coster along with a couple of meet and greets and resturants .
I'm sure someone who is better with google maps can plot out sizes better. They also seem to have some room behind beauty and the beast and in front of fantasmic to build also. If I had power I would get rid of the beauty stage and put up another ride or two there.