Abu Bashir says: I heard Imam Muhammad Baqr say: “... He said: When Hazrat Mahdi (as) appears he will follow in the path of the Messenger of Allah (saas). ONLY HE [HAZRAT MAHDI (AS)] WILL EXPLAIN THE WORKS OF THE MESSENGER OF ALLAH...” (Sheikh Muhammad ibn Ibrahim Numani, al-Ghaybah al-Numani, p. 191)
This hadith particularly refers to the End Times. Since it is Hazrat Mahdi (as) who will personally know the truth of these hadiths it is he who will most accurately elucidate the hadiths of our Prophet (saas) concerning the End Times.