Casual Marvel Cinematic Universe fans and many Joss Whedon fans may initially freak out at the news, but The Avengers franchise is in good hands with the Russo Brothers.
Joe and Anthony Russo are already familiar with the MCU, having co-directed Captain America: The Winter Soldier, and are already working on Captain America: Civil War, so helming the culminating Avengers films should be right up their alley. Not easy, but familiar. They plan to film both Part 1 and Part 2 in one long shoot, beginning in 2016 (no production dates set as yet).
The current release schedule for Marvel TV and movies (adjusted a bit to allow for Marvel’s new involvement with Sony on the new Spider-Man movie):
Daredevil: April 10 2015 (Netflix)
Avengers: Age of Ultron: May 1 2015
Ant-Man: July 17 2015
Captain America: Civil War: May 16 2016
Doctor Strange: November 4 2016
Guardians of the Galaxy 2: May 5 2017
The Spectacular Spider-Man 2: July 28 2017
Thor: Ragnarok: November 3 2017
Avengers: Infinity War Part 1: May 4 2018
Black Panther: July 6 2018
Captain Marvel: November 2 2018
Avengers: Infinity War Part 2: May 3 2019
The Inhumans: July 12 2019
Bonus: if you search Netflix for “Marvel”, you’ll see in addition to the Daredevil trailer, they already have placeholders up for Jessica Jones, The Defenders, Luke Cage, and Iron Fist.
Hollywood Reporter: Russo Brothers to Direct ‘Avengers: Infinity War’ Parts 1 and 2
Den of Geek: Full Marvel Movie Release Calendar