Ah, whatever happened to the Manchester Zoo?
It is somewhat strange coming across this thread again, and I do remember when I first saw the concept for the Manchester Zoo. Indeed, I was rather impressed, as the conceptual artwork showed that the zoo was apparently very capable of becoming a new major zoo of the UK. However, the conceptual artwork released was seemingly the last of it as well - no details on exhibits, or any other concept artwork, as Bristol appears to be doing before it packs up for 2024.
From what I see, the to-be zoo's social media was fairly active in 2019-ish, though around 2020, progress starting slowing down. It would seem that they would reappear in 2021, but seemingly not again. As much as it would be nice to have a new large zoo in the UK, I would say that the project of the Manchester Zoo is somewhat dead at this point - even the zoo's website domain is no longer registered..
Though it would be interesting if they were to resurface this year..!