Remember, most people visiting SW and looking for Luke, Leia and Han aren't stupid. They're normal people with lives. Most guests visiting SWGE will not be hardcore SW nerds or theme park geeks. They'll be families on vacation. Most people watch a SW film and then get on with their lives. They don't dwell on backstories, make-believe history or the ins and outs of film making. When they go to "Star Wars Land," they expect to see Darth Vader, light sabers, the Milenium Falcon, Chewbacca and stormtroopers. They expect the rides to be fun and worth waiting in line for.
I expect, depending on how much merchandise future films sell, the land will grown more and more mainstream, to the point where, eventually, it will mainly reference the original classic trilogy and all its iconic imagery.