Let's just hope and pray that the file size will atleast be 350GB-400GB otherwise you can't make a decent racing.
I mean just look how many terrible racing games in the past were made due to small file size:
1) Screamer 2
2) Colin McRae Rally 2.0
3) Racing Driver: Grid
And we definitely need to make everything open world because before this nobody had fun.
It's infinitely more fun dive grinding through the same repetitive procedurial generated terrain of rehashed textures for miles and miles.