That is possible; he has made some noises about how this means the restoration of the Caliphate, etc. I think ethnic hostilities would probably prevent him from emerging as the leader of such a diverse group of countries, but it's hard to say.
Actually the phrase is
“the hidden mahdi.”
The only leader right now who has anything “hidden” is 0bama. From his birth records, to school records, to his real past life/lives...all are hidden.
The laughable nobel prize he won was for ... international diplomacy and co-operation between peoples.
Speaking outside the White House, he said he would accept the prize as a “call to action”. http://news.bbc.co.uk/2/hi/europe/8298580.stm