Europa Park released their first episode of the "DIE BAUDOKUMENTATION" or the construction documentation: https://www.veejoy.de/de/serien/o-die-baudokumentation/wie-alles-begann
They don't disclose anything in detail about the ride but there is one very interesting part. Remember the rumor some years ago that they are planning to put a coaster in the middle of the park in 2022 / 2023? They actually planned it for the England section at first and they also show a few seconds of POV of this could have looked. They also state that, although the layout is not identical, it's similar and the new coaster for Croatia is even longer than the one proposed for England. The general experience should be similar which leads me to believe, that they were already sure of the coaster type.
Other than that, they are teasing that they will disclose the length, inversions and other details in the next episode.
No visuals of the new coaster were given. Stay tuned for next month