Did Hazrat Ali (rta) Possess Any Future Knowledge?
Hazrat Ali (rta) did not possess rank of Prophethood, therefore there is no reason to assume that Allah informed him regarding future. It is only prophets (sws), who are shown some of the unseen by Allah, which is required for the fulfillment of their duties. As for any other person acquiring some of the future knowledge ( like certain future prophecies ) through innate skillset which gives a certain potential to the individual to excel in the science of inner-self ( nafsi ulum ), then this could be possible for anyone. One prominent example would be Baba Vanga . Please also refer to the following videos : Please refer from 21:24 to 24:09 https://youtu.be/hpwNW2AelvA?t=1284