Aiden Markram, Lungi Ngidi and Keshav Maharaj will be the big-name Proteas in the SA20 auction after all six teams announced their pre-signed and retained players ahead of season 4.
Lance Klusener will stay on as head coach of Durban's Super Giants ahead of the fourth season of the SA20.
MI Cape Town will kick off their SA20 title defence with a home game against Durban's Super Giants at Newlands on 26 December after the league announced the fixtures for the fourth season.
At least 72 player slots will be up for grabs and an increased salary cap for the six franchises in the SA20 auction that will take place on 9 September in Johannesburg.
Durban's Super Giants ended their Season 3 campaign on a positive note with a thrilling 11-run DLS victory over Joburg Super Kings at the Wanderers on Saturday.
Durban's Super Giants captain Keshav Maharaj lamented his team's poor start with bat and ball after they crashed out of this season's SA20 with one league match still remaining.