Special specifications of Imam Mahdi (AS)

In the previous part, I provided extensive traditions from the six authentic Sunni collections concerning the fact that Imam Mahdi (AS) who is different than Jesus (the messiah) WILL come and he is the descendant of Prophet and his daughter Fatimah. The traditions further illuminated the fact that Jesus (who was a great Prophet) will pray behind al-Mahdi (who is an Imam). Also I gave the fatwa of Sunni scholars who stated that the belief in the "Mahdi of the House of Prophet" is one of the Islamic tenets for "Ahl al-Sunnah wal Jama’a", and any one who denies it is either ignorant or an innovator.
In this part however, I would like to talk about some special specifications of Imam Mahdi which is questionable for a majority of Sunnis. Imam Mahdi’s Identification:
Shia believe that Imam Mahdi is the only son of Imam Hasan al-Askari (the 11th Imam) who was born on 15th of Sha’ban 255/869 in Samarra, Iraq। He became the God-appointed Imam when his father was martyred in 260/874. Imam Mahdi went into occultation (disappearance; leaving among people while they can’t recognize him) at the same time. He will re-appear when Allah wills. More specifically:

His title is "al-Mahdi" which means "The Guided One."
His name is Muhammad Ibn al-Hasan (AS).
His lineage, traced back to al-Imam Ali (AS), is: Muhammad Ibn al-Hasan Ibn Ali Ibn Muhammad Ibn Ali Ibn Musa Ibn Ja’far Ibn Muhammad Ibn Ali Ibn al-Husain Ibn Ali Ibn Abi Talib (AS).