@markmeier
I am missing all of your great updates for the tierpark!
Well, actually I have been rather busy and when I finally got some holidays it just seemed so much that I hardly knew where to start.

But as it won't get any easier this way and you already pointed me out, I guess I'll just start with the latest updates from the main building sites. As I have asked the German Schueling Forum user W. Dreier for permission in the past, I'll just try to enter some of his pictures directly.
1)
Savannah exhibit:
They created a new ditch/trench and coated it with artificial rocks
Picture: W. Dreier
Here you can see some of the new structuring:
Picture: W. Dreier
The stable buildings have been hidden behind wood (a bit similar to the gerenuk enclosure but even more dense)
Picture: W. Dreier
And this later picture already shows a bit better what we can expect in the end
Picture: W. Dreier
2. Elephant Exhibit
The ditch is quite similar to that of the savannah. But I'm not quite sure what this is supposed to be for/become. Perhaps they'll add metal posts with steel cables - like with the rhino pagoda at the zoo. But this construction seems a bit too massive for that (or did they secretly clone some mammoth...?
Picture: W. Dreier
I'm also not sure what this will be for: Contact zone? Feeding opportunity for visitors?
Picture: W. Dreier
And will this be for smaller animals or rather for elephant enrichment? I would assume the latter.
Picture: W. Dreier
The old concrete walls will receive a thin new coating (as a first impression, I actually like this much better than the planned fake rock formation - and it will be much cheaper which probably is why they chose this option)
Picture: W. Dreier
As you can see, there has been quite a lot of progress. I think they'll be able to present the Savannah by next season (Spring or Summer 2023).
However, they had some problems to get material for the new roof of the elephant building. So this may be delayed until 2024 (and it probably will get even more expensive than planned).
3. Asia enclosure
Due to overall rising costs, they also delayed working on this smaller project until after summer when some prices are predicted to drop. So I'm not sure, when this will open. But it could still be in 2023 as it isn't such a big area like the Himalaya or Africa zones.