WRC mainclass from 2027

[WRCStan]

If the upgrade rally2 car can win wrc27 now , why that can't happen in 2027, imagine this will take place

Toyota wrc27
Hyundai upgrade rally2
MSport wrc27
Lancia wrc27
Toksport WRT Skoda upgrade rally2
PH Sport Citroën upgrade rally2
Peter Solberg WRT subaru upgrade rally2

other private drivers original rally2


no matter how the total entry numbers will increase

Win the Driver's championship? Possible.
Win the Manufacturer's championship? Depends who it is open for and who enters. Need rules.

Is Rally2 being upgraded though? Did I forget this already?