Captain America 2 and 3 directors, Joe and Anthony Russo, have been named as possibly taking the reins from Josh Whedon for the Avengers movies.
It's also stated that in addition to Chadwick Bosemann being featured as Black Panther in Captain America 3, that Sebastian Stan will reprise as the Winter Soldier and Anthony Mackie will be back as Falcon, in addition to Samuel L. Jackson as Nick Fury and Scarlett Johansson as Black Widow being involved.
Another name that has previously surfaced to take over for Whedon and The Avengers is Guardians of the Galaxy director James Gunn.
Captain America: Civil War has a May 5, 2016 release starring Chris Evans and Robert Downey Jr.
The Avengers: Infinity War Part 1 has a May 2018 release followed by Part II with a May 2019 release.