I think this has been suggested a million billion times before... The problem is that the dev team is very small and they do not make enough money to pay for licensing rights to either F1 or Spa-Francoshamps as a racetrack. As of right now, it is impossible to do something like this. The closest you have is perhaps a custom layout and the f1 mods in S3. There's 2 or 3 modern era F1 cars (post-2014 with the V6's).