Idk, they just announced that trilogy, and we can't really expect the first movie to come out till at least 2021. I doubt they are deep enough into the Johnson trilogy to really know whats going to be the big thing in there yet. Not to mention, if its a different time and place, it really couldn't be next to the Falcon and New Order logically. Always possible, but I'd be surprised. I'm assuming this is like HP where Uni already had their plans for Diagon before they ever opened Hogsmede. I think they know exactly what they want to do for the expansion already.