Issues about Imam Mahdi (mgehr[1]) in Sunni Sources
Perhaps a lot of Shias and Sunnis do not know, how many various issues in Sunni sources have been about Imam Mahdi (mgehr) and his emergence. [Here are] some examples:
12 caliphs after the Prophet (pbuh&h); they are as many as the chiefs of Israelites.[2]
2-   Rightfulness of a man from Quraysh; named “Mahdi (mgehr)â€