From the maps that he posted in his mini-scenario, the Indo-Aryan tribes were concentrated in the Hindu Kush mountains, roughly the same territory as OTL Afghanistan, bordering a surviving Indus/Harappan civilization called "Meluha". As the scenario progressed, Flocc posted a seriesof maps showing that Meluhised areas were slowly inflitrating the Indo-Aryan areas; at the same time, the Indo-Aryans were slowly spreading to some regions south of the Hindu Kush.
Assuming that the people of Indus Valley civilization/Harappa were Dravidians and their way of life survived by like for example, moving the center of their civilization to the Ganges River area while maintaining a presence in the Indus River, what would possibly happen to the Indo-Aryan tribes? Would they experience the same fate like in Flocc's scenario? What could be its impact on history and culture of South Asia in general?