There is no evidence because the San and Khoisan still exist in the southern lands. In terms of the origins of the Ba.Ntu most studies focus on their dispersal and migration pattern, as well as location of Ba.Ntu language families.
They portray the Bantu as a cancer to the African continent. One that spread out from a small area to dominate the majority of Africa and pushed out the San and Khoisan. What I don't get is, what evidence is there to support the Bantu expansion hypothesis.
And if the Bantu migrated from North/Africa/Ancient Egypt why are there no Bantu language groups in those countries.