The only information we have about this sequel is that it will be written by David Callaham (Shang-Chi and the Legend of the Ten Rings) and will be directed by Grant Sputore (I Am Mother) after director Adam Wingard (Godzilla vs. Kong, Godzilla x Kong) left the franchise. Details such as the plot are yet to be revealed.
[Additional info from The Hollywood Reporter (link 2, link 3)]