Per The Hollywood Reporter, Cretton is best known for directing the movie Short Term 12, an independent film about a supervisor of a group home for troubled teenagers.
Chinese-American writer Dave Callaham has been said to be writing the Shang-Chi script, which Deadline says "will modernize the hero to avoid stereotypes that many comic characters of that era were saddled with".
It was announced late previous year that Marvel Studios was developing a movie based on Marvel Comics' Shang-Chi with Dave Callaham writing the screenplay.
Cretton's now helming Just Mercy (which he also wrote) with Michael B. Jordan and Brie Larson, and picked up a lot of positive attention with the excellent Short Term 12. Cretton's actually working with Larson again right now, on an upcoming release called Just Mercy.
The news comes as Captain Marvel has raked in $524 million at the worldwide box office.
The original Marvel Comics Shang-Chi features Shang, a half-Chinese, half-American superhero created by writer Steve Englehart and artist Jim Starlin.
Larson first worked with Cretton when she starred in his second film, Short Term 12. In recent years, he has become a prominent member of the Avengers and the Secret Avengers, with major roles in both Jonathan Hickman and Warren Ellis' runs on the titles. Both of those movies, and pretty much everything else Marvel Studios has done, have turned into huge hits, so the decision to make a Shang-Chi movie and how quickly things are moving to get it made shouldn't come as too big of a surprise.
Shang-Chi will be Marvel's first MCU film featuring an Asian lead actor, as well as a primarily Asian-American and Asian cast.