It also remains to be seen if Quentin Tarantino would direct Django/Zorro, though as the report notes, Tarantino has said many times that he plans to retire after making his tenth film, and Once Upon a Time in Hollywood is Film #9.
So it’s a good bet that he may end up simply producing Django/Zorro should it get the green light.
It hasn’t been clarified if Jerrod Carmichael is working on the Django/Zorro script on his own, if Quentin Tarantino is tackling it with him or if another, unidentified writer is involved.