Indiewire has reported that the third and final book of Veronica Roth's Divergent trilogy will be released on the 18th of March 2016. Lionsgate has also confirmed that Allegiant won't be split into two parts, unlike a lot of young adult (YA) book-to-film adaptations like Mockingjay (Hunger Games trilogy), Breaking Dawn (Twilight Saga), and Harry Potter and the Deathly Hallows (Harry Potter series).
Last year, it has also been reported that Neil Burger will not return to direct the sequel of Divergent, which is Insurgent (to be released March 15, 2015). Brian Duffield will write the screenplay of the second book's adaptation to the big screen. Lionsgate is still in search for Insurgent's director since Burger won't be able to have enough time preparing for the sequel that is already slated on the 15th of March 2015.