In a recent interview on Earwolf’s Happy Sad Confused podcast (as reported by CBM), Hiddleston talked about a number of topics, including his work on the upcoming Kong: Skull Island. He also delved into what is in store for Loki in the MCU, both in Thor 3 and (maybe) beyond:
“[Thor: Ragnarok] is coming around. I saw Chris Hemsworth in Australia. He lives about an hour away from where we were shooting Kong: Skull Island, and he was full of beans about Thor 3. Thor 3 will be cool because I’ve not done it for four years. I love working with Chris [Hemsworth]. This will be my last time out of the gate.”
When asked if that meant that Loki would not be returning for The Avengers: Infinity War Part One after his appearance in the next Thor movie, Hiddleston backtracked a little:
“I don’t know! Honestly, I don’t know. They haven’t got their ducks in a row yet. They make it up as they go along.” (????)
Captain America: Civil War will release on May 6, 2016, followed by Doctor Strange – November 4, 2016; Guardians of the Galaxy 2 – May 5, 2017; Spider-Man – July 7, 2017; Thor: Ragnarok – November 3, 2017; Black Panther – February 16, 2018; The Avengers: Infinity War Part One – May 4, 2018; Ant-Man and the Wasp – July 6, 2018; Captain Marvel – March 8, 2019; The Avengers: Infinity War Part Two – May 3, 2019; Inhumans – July 12, 2019; and as-yet untitled Marvel movies on May 1, July 10 and November 6, 2020.
source : Sad Happy Confused