The Russo Brothers, who directed Captain America: The Winter Soldier, are set to direct Avengers: Infinity War, parts 1 and 2. The brothers will also direct Captain America: Civil War, a film that will go into production in April.
According to Badass Digest, the deal has been finalized between Marvel Studios and the Russo Brothers and that filming will begin in 2016. The plan is to film both movies back-to-back between 2016 and 2017 to prepare them for release in 2018 and 2019.
Christopher Markus and Stephen McFeely, who wrote the screenplay for Captain America: The First Avenger and Captain America: The Winter Soldier, are expected to pen the script for both Infinity War films. Apparently, Marvel believes both writers work very well alongside the Russo Brothers, which is the main reason they have been chosen.