As it hasn’t been posted in here: The park has ended the season prematurely due to COVID. The winter season has also been cancelled for 2020.
So any hopes to be able to ride Abyssus in 2020 are gone for now. I hope they will be able to open on time in 2021.
A friend of mine was in the park today, and spotted some green tracks laying on-site next to the Minetrain tracks. I asked im to take some pictures tomorrow, he only spotted them from the lifthills.
As far as I know, the green tracks are new, probably for the next expansion (or maybe together...