Five rookies will be on the grid in a major changing of the guard; Le Brocq joined by Richie Stanaway (Tickford Racing), James Golding (Garry Rogers Motorsport), Anton De Pasquale (Erebus Motorsport) and Todd Hazelwood (Matt Stone Racing).
Hazelwood will also represent a new team, stepping up with MSR after winning the Dunlop Super2 Series together to race an ex-DJR Team Penske Falcon FG X it has now taken delivery of.
New in name is 23Red Racing, built from what was Lucas Dumbrell Motorsport with Phil Munday buying a 60 percent stake and switching from two ageing Commodores to a single ex-Tickford Racing Ford Falcon.
Davison is the only established driver switching teams with his move to 23Red, while Andre Heimgartner returns to Supercars - for what will be his third full season - with Nissan Motorsport.
Heimgartner replaces Todd Kelly, who, along with Jason Bright, retired at the end of the 2017 season, as James Moffat and Dale Wood step back from full-time drives with GRM and Erebus respectively.