To regard one's immortality as an exchange of matter is as strange as predicting the future of a violin case once the expensive violin it held has broken and lost its worth.
As the world has to attain the fulfilment of eternal life, to me it does not in the least matter what I am called -'Enlightened One', 'Son of God', or something else. To me, it has no purpose - as little as when the Buddha said, 'I am the Enlightened One'.