GT never really had much of a campagin mode. It's mostly race to unlock cars, upgrades, and tracks. If Sony can pull off the online portion, I can see this game being the evolution of racing sims. From, https://www.finder.com.au/gt-sport-career-mode
"The FIA came to Polyphony Digital in 2013 with a desire to look at the future of motorsport. Yamauchi spoke to me about the impact heading to the FIA’s French headquarters had on him.
“I immediately got a lot of inspiration and a lot of ideas came up.” Any chance of a Gran Turismo 7 went out the door at that moment. Sport was born and Yamauchi’s focus is now on taking this FIA opportunity and using it to push the boundaries on what is possible with a racing game.
The career mode, or Campaign as it is referred to in Gran Turismo Sport, ends with your FIA license arriving in the post."