To be clear, if they did go with a plan like this, there would still only be one flat rate theme park admission ticket that gets you into all 4 worlds. They would not be available ala cart, since that would be disastrous for the lesser popular lands.
I would guess to allow guests into the shopping/entertainment district like Disney Springs, but then coerce them into entering the theme park elements while they’re there.
Problem is, parking at Disney Springs is free. Unless they offer free parking here, they’re not going to get anymore foot traffic at this CityWalk as they do at their regular CityWalk — which is mainly composed of people traveling to and from the parks.