I am running a campaign currently that will begin with the Lost Mines of Phandelvar module and move into the Tomb of Annihilation module afterwords, It would be great to be able to swap out modules within the lobby or to load up both modules within the lobby for easier transition, rather than needing to change to a completely different lobby and redo certain aspects of game prep. This suggestion feels even more necessary now that the Tyranny of Dragons module (which is 2 parts) is being released later this month.