The update is 2,3 GB heavy. However, it only adds the GT-R Premium 2017. While the car itself is incredible and many fans of the game are enjoying it, there could some future content hidden in the update. The update is featured in the game's Twitter and can be found here. Lastly, the same car for the PC version of the game should arrive in the end of the month.
Here is the Need For Speed trailer that highlights Nissan GT-R Premium 2017: