According to The Hollywood Reporter that cinematographer, John Toll, is in negotiations to join Matrix 4. He was also the cinematographer on Legions of the Fall and Braveheart for which he won Oscars. He has worked previously with the Wachowskis on Cloud Atlas, Junipter Ascending and Sense8.
Geoff Darrow tweeted that he and Steve Skroce will be boarding the Matrix 4 production as concept artist. Both gentlemen worked on the The Matrix.