Even if it doesn't happen, I'm curious how they're proposing this would work, in terms of moving guests directly past Grand Avenue/Plaza and into SWL. The only possible reconfiguration I could see is snaking Galaxy's Edge around the back of Muppets, which doesn't remotely seem feasible given the service road situation. That road is also unlikely to be easily diverted, at least while construction continues in the lot.
Perhaps this new exit/entrance could be done further the 2020's? Not directly after the land opens, but as an option to keep Star Tours around longer?