Great news! I just booted up my ps4 and saw pop up message regarding an update. Had no idea that gt4 cars was releasing today. I googled “ACC ps4”, to find out news about what was the update for within the past 24 hours selected. So I scrolled down and saw ACC GT4 Pack DLC on PSN store. I am going to buy it now.
Edit: There’s a season pass too. Currently, the GT4 Pack is $19.99 obviously and the season pass itself is $24.99, which will have the GT4 Pack and the upcoming British GT Pack(Winter 2020). So I will buy the season pass then.