Board Thread:Game Discussion/@comment-29746749-20190409133748/@comment-32672384-20190409153819

Depends on the deals they cut.

They may either have a deal where they can use the car in whatever series they want (and therefore can give it an ES whenever they want)

Or they may have a deal where the series the car appears in also needs to be agreed upon by the manufactuers. In which case an ES would need to be planned, and adding one later can be hard.

As for 2 and 3, it's probably not hard for them to make an ES, seeing as they pick a car, then they throw random tracks at it, adjusting the laps to be lower for slower cars, and then adjusting the gold reward based on the car. Therefore my guess is the ES is 'locked in' 1 week before the next update, as that's when it is announced. And yeah they can change it after announcement if they wanted to, many series in career have had extensions to add new cars to them, the tools are there.