It was announced last week [soylentnews.org] that Colin Trevorrow [wikipedia.org] will no longer direct Star Wars: Episode IX. In finding his replacement, Lucasfilm turned to a familiar face [starwars.com]... J. J. Abrams [wikipedia.org]:
J.J. Abrams, who launched a new era of Star Wars with The Force Awakens in 2015, is returning to complete the sequel trilogy as writer and director of Star Wars: Episode IX. Abrams will co-write the film with Chris Terrio. Star Wars: Episode IX will be produced by Kathleen Kennedy, Michelle Rejwan, Abrams, Bad Robot, and Lucasfilm.
The release date has been moved [deadline.com] from May 24, 2019 to December 20, 2019.
Also at Entertainment Tonight [etonline.com]. Here's another article about Trevorrow's firing [vulture.com].