Wow, that's some crazy spinwork you got there ehh?
the only thing we know is that Darkseid hit him from behind with the OE, DD dropped, DS said he was dead, and then he got rushed from behind.
I don't think the OE dropped DD there, especially since his OE wasn't anything special in that entire arc.
Couldn't wipe out Henshaw, and was basically just a brick with plot device lasers.
Ehh.