There are still several facts about Akhenaten's reign which are
unclear, in particular the possibility of coregency with his father at the
start of his reign or with Smenkhkare at the end.
There is also uncertainty about the relationship between Akhenaten and
his successors, Smenkhkare and Tutankhamun. It
is accepted that Nefertiti had 6 daughters, but no son was ever shown in
reliefs. It is possible that both successors were Akhenaten's sons by
another wife, possibly Kiya who was 'much loved' of the Pharaoh.
The final mystery of Akhenaten was what became of his mummy. Fragments
of sculpture and carving from the royal tomb at Akhetaten shows that his
body was originally put there, but no sign of the mummy remains. It is
possible that followers of the Aten feared for the destruction of
Akhenaten's body, which would deny him eternal life. These followers may
have moved the body to a place of safety, possibly at Thebes.