The Ark of Covenant will be found and put in front of Hazrat Mahdi (pbuh). Believers who see this will feel intoxicated with the love of God. 
(A9 TV; November 12th, 2013)

In the time of the Mahdi (pbuh) there will be an amazing wealth. Goods will not be stored but will be constantly distributed. 
(A9 TV; November 12th, 2013)

In the time of the Mahdi (pbuh) the earth will be filled with justice instead of persecution and torture. 
(A9 TV; November 12th, 2013)