A decision on Darren Lehmann's future as Australia coach may also be announced by CA.
Renshaw, who was dropped for the 2017-18 Ashes at home last summer, has shown tremendous form since the Shield resumed post the Christmas break.
"I played them previous year for my debut so I've sort of got some idea of what's coming, but I'll just try to enjoy getting back and playing for my country".
Matt Renshaw potentially could replace Warner for the final Test in Johannesburg.
While Bancroft only averaged 25.57 with the bat during the Ashes, he has fared a little better in the ongoing Test series against the Proteas as he is Australia's highest run-scorer with 223 runs, which includes two half-centuries, at an average of 37.16. And now, after the public outrage in Australia against Smith and Bancroft for bringing disrepute to the game of cricket, Cricket Australia forced to bring Renshaw into the team.