sorry had a busy day but here is the quick cut and paste i did, the buildings are to size inclduing the small buildings that i got from the WD beauty Beast beast area. Obviously the shape of the land is different then WDW so any construction could easily be modified so that things look a bit more in place.
The show building is from the new Tokyo land and would be treated similar to how IASW is built with a passage way under the berm and the queue building in front of the train tracks. the other small buildings i just cut and pasted with some adjustments and placed them around the fountain. what i believe is the storytime building was placed on the south east side as you enter this new area.
I added a pathway that could be placed to connect to Galaxy edge. This pathway can be cut into the dirt berm they added and would be heavily planted nearest this land and transition to the more dessert look as it joins the Galaxy edge fantasyland entrance path.
The fork that is created by the service road and pathway would use swinging gates to close the pathway when needed. not unusual and has been used in other parts of the resort.
The show building for the new ride would butt up against the Mickey meet and greet building and can also butt right up to the rescue rangers mini coaster and themed to create a backdrop for toontown. This might be an especially good thing because it would block some of the sun that fades many of those facades during the hot mid day hours.
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i really do not think that would be much of a problem if they used swinging gates. The lower portion of the service road (area right pass the new path i added) the south end of the theater narrows and is where the large metal tube tunnel is. The main portion of the road can be redirected and not be a problem.