It would be very surprising see Celestial dGPU in 2025. More like H1/2026 is possible. The first variant of Battlemage (BMG-G10) was reported to be in lab testing in late August 2023. It is possible though that it missed the mark quite bit and design got major overhaul after that as the engineering samples of G10 did not show up in shipping manifests anymore after Q1/2024. Or then it was just test mule for the architecture and was not even planned to be released. Who knows.
Huge BMG-G31 non R&D shipment shipping manifest was published 3rd of December and listing had date 29th of October. So if it is / will be cancelled, the plug has been pulled quite late stage. Not as late as AMD, which seems to be adjusting Navi48 based cards release date again. According to Videocardz, RX9070 series release date will be in March:
https://videocardz.com/newz/amd-confirms-radeon-rx-9070-series-launching-in-march
There's plenty of time and space in market for Intel release G31 during Q1 or even early Q2.
However it is possible that Intel and AMD are holding things back to see U.S. new administration moves on tariffs. Percent based tariff (in scale of Trump's words of 50-75%) would tip the price a lot in U.S. market and effect on sales a lot. But there's definitely something weird going on with all these delays.