Let me check on my crystal ball...
I´ll be back....soon.
Wait here for me.
Edit: no idea...if you ask me "will it rain in the UK today?" I will probably give you a better answer ...but with PD no one knows.
Jokes aside, there will be two big updates in January, one more in February, March, April...and so on...
In one of the latest interviews to Kaz from Jordan, he talked about updates (not the content in them though). Kaz said that will be one at the end of this month (1.02 it is, having in mind that Christmas/holidays are coming), the rest will come in January and upcoming months.
Since track editor is one of the main features of the game it sure will appear soon in the next month.