Possible, but unlikely to be anybody's preference as long as there's a promoter in place and an FIA president keen on commercial/financial viability.
All you need to avoid that is have every car of a manufacturer be able to score points for them. It would encourage them to support privateers if they want to win the title.

Have to say that this time round I was pretty enticed with the rally so I watched it more than actually being on the forum and also once I saw less people commenting here it made me as a result...
WRC Croatia 2026