I've gone on a bit of a dig around today, and found 3 different versions of the masterplan for the development. I may have missed this, but it looks like the plan that we keep seeing in news reports etc isn't the current one (BBC/Wales Online keep using the mock ups of the original verison as I assume they were the only mock-ups released)
This was the plan as originally released and had outline planning consent, and until today the plan I thought was most current:

It has the zig-zag replacement for the RDC on the right, the 4* hotel next door to the arena and the WMC academy at the bottom across from the WMC itself.
However, in a report from Rio (the Architechs behind the original plan) in October 2024 on the Council's website, they talk about the 'Council's emerging masterplan', which they share an image of:

This new design is also spotted in a Economic Impact Assessment from Savills for the Council, also in October (see how the purple buildings now match the Emerging Masterplan, not the original.

However, Rio also proposed a 3rd plan in the same report, here's the plan:

And here's the 3d mockup.

The key changes include dropping the cinema altogether (they claim it would be low rent compared to the cost of redeveloping, but still included an option to add it in if needed), erasing the WMC academy (as that's now part of the Cardiff Live development instead) protection of the land above the dock feeder (as there's a legal easment not to build on it). It also reduces the main arena sqaure, taking half of it into a park and moving rhe 4* hotel to fill the other side of the square. This plan was presented to the cabinet in october, described as:
The Council has continued to work with the developer and colleagues in the Local
Planning Authority to consider their current vision for the site to help inform their due
diligence. Here's a link to the Rio report, page 22 and 23 give a good explanation of their plans for each building.
https://cardiff.moderngov.co.uk/documents/s81540/CAB%2017%20October%202024%20-%20Atlantic%20Wharf%20Appendix%2010.pdfDid I just miss the reporting on this?