The Ultimate Fighter Brazil 3 Finale on May 31st has a new main event as Junior dos Santos will face Stipe Miocic and the perviously announced main event between Chael Sonnen and Wanderlei Silva is now targeted for UFC 175 co-main event. 
The news of the change was first reported by Kevin Iole of Yahoo Sports as he was told of the change by UFC President Dana White.
Dos Santos and Miocic were initially scheduled to meet in the co-main event of UFC 173 on May 24th in Las Vegas and as of right now, the co-main event of that card will be Robbie Lawler vs. Jake Ellenberger in a welterweight bout.
The Ultimate Fighter Brazil 3 Finale will take place from the Ibirapuera Gymnasium in Sao Paulo, Brazil on May 31st and the current fight card is below.
Junior dos Santos (16-3) vs. Stipe Miocic (11-1)
Paulo Thiago (15-6) vs. Gasan Umalatov (14-3-1)
Kevin Souza (14-3) vs. Mark Eddiva (6-0)
Ernest Chavez (7-0) vs. Elias Silverio (10-0)