Yesterday, a rumor was making the rounds that casting for the role of Adam Warlock was already happening for Guardians of The Galaxy 3 with a “Zac Efron-type” and James Gunn took to Twitter to debunk that claim rather quickly. The filmmaker is currently shooting his HBO Max series Peacemaker in Vancouver and clarifies there isn’t any casting underway, which makes sense since he’s on WarnerMedia’s dime at the moment.
This actually isn’t the first time James Gunn has addressed this Zac Efron/Adam Warlock rumor on social media as he debunked this exact thing on Instagram back in 2019. Suggesting that Adam Warlock wasn’t even going to be in the film as this rumor seemed to originally come from artist Boss Logic, about three years ago.

He did have a more fun update, as Gunn confirmed that filming on the sequel would be taking place later this year in London. While the filmmaker shot The Suicide Squad and Guardians of The Galaxy Vol.2 in Atlanta, the original Guardians film was shot in the United Kingdom. Ant-Man 3 and Captain Marvel 2 are also expected to shoot in the United Kingdom in 2021.
Marvel/Disney hasn’t given Guardians 3 an official release date but is said to be out sometime in 2023.
SOURCE: JAMES GUNN