What is expected to happen on the Day of Judgment, and will anyone from Banu Tamim intervene in its events?

If the question is about the signs of the Hour and tribulations (fitan), one can refer to specialized books. As for the influence of Banu Tamim on the events of the Hour, the intended person might be "Shu'ayb ibn Salih al-Tamimi," who is said to defeat the Sufyani and pave the way for the Mahdi. However, many of the narrations from Nu'aym ibn Hammad concerning this matter are not authentic. A rejected (munkar) hadith (definition) was narrated by Al-Tabarani mentioning a young man from Banu Tamim who would be the bearer of the Mahdi's banner. What is authentically established regarding the virtue of Banu Tamim is that they will be the most severe against the Dajjal, as stated in the hadith narrated by Abu Hurayrah, agreed upon (by Al-Bukhari and Muslim). If the question is about the horrors of the Day of Judgment and its stages, one can refer to related fatwas and the book "Belief in the Last Day" by Dr. Omar Al-Ashqar.