According to Saiyan Island, starting on March 3, the "Naruto Shippuden" will divert from its fillers and focus on a new Itachi Uchiha storyline. It will be part of the "Itachi: The True Legend" novel series.
The episodes will be based on two novels released in Japan. The two novels together combine for 544 pages, and Saiyan Island speculated that they would translate to at least nine anime episodes. See their theory on why
After Itachi's storyline, "Naruto Shippuden" will finally return to the original storyline. It will finish the Jinchuuriki Madara arc and jump into the Kaguya Arc, the final arc of the show.