If they have any brains at all, and I believe they do but am not as confident as I used to be (at least at DLR...WDW seems to be under good control) they will definitely restrict access to SWGE. They will form queues for SWGE
outside the land - probably in the BTM Trail area. They will have one way in and two ways out. The ways out will be one way traffic only.
They will use MaxPass to restrict access. And only give out MP to either ROTR or MFSR (not both on same day) and only one MP per day to SWGE.
They will form lines for SWGE on Main Street in the morning (sort of like what they did for GOTG in HollywoodLand area). With ropes monitored by Cast Members, and many, many signs directing people where to go. Those folks will be let in slowly to BTM Trail area and queue there, and then into SWGE in small bits. All controlled with ropes and CMs and signs.