Is Donald Duke Obasanjo's Chosen Successor?

When I saw this photo of a Govenor exchanging greetings with an African head of state (Kaigama of Rwanda), with a beaming President Obasanjo in the background the first thought that came to my mind was, Duke may indeed be the annointed successor hence OBJ's smile, like a proud father imagining what it will be like when his son becomes President and hosts other heads of state.

What is your own interpretation, if you have one? Do you see what I see?