Almighty Allah has explained Mahdi (pbuh) in great details in the Qur'an but in a very concealed manner. For instance in the story of the Prophet Solomon (pbuh), in the Surah Yusuf, Allah explained the Mahdi. In the story of the Dhul'Qarnayn, in the Surah al-Kahf, in the verses related with the global dominion, Mahdi is explained in details. There are many signs. - Harun Yahya