I think it's safe to say he’s got at least another 2-3 years left in the NBA as a backup (or 3rd stringer) before finishing up in the NBL.
I've got no knowledge if it's true or not but Delly has made over $40m US so far in the NBA, it's not like he needs to work another day in his life again.
He's spent his prime years sitting on the bench not playing so maybe he would rather come back home and play rather than staying over there to sit on the bench for a few more years for what maybe $10m? What's the difference between $40m and $50m?
The news could be Delly coming back home or possibly Essendon FC starting up that rumoured basketball team?