It's just a staggered release to boost high end sales.
What makes you think they will suddenly drop a consumer well know naming scheme?
It's Rubin, the next generation after Blackwell and already announced and pictured by Nvidia.
You should know these tech companies are working on tech way in advance before it's released. For example Nvidia probably has Feynman complete or near complete and doing testing.
Rubin CPX is also laid out the same way as the 5090, with a few changes. Giving it a high chance of being the 6090.
5090