In the Q2 2024 earnings call, Daniel Araujo, the mobile experience vice president at Samsung, promised that the Galaxy S25 series will see "top-of-the-line" camera and display upgrades. Araujo has also said to expect boosted AI performance and better "overall premium experience" from the lineup.https://www.notebookcheck.net/Samsung-executive-promises-top-of-the-line-camera-and-display-upgrades-for-Galaxy-S25-series.870603.0.html
If the 50MP sensor is much smaller though, it won't be an improvement. I'd rather a 10MP 1" sensor than a 50MP 1/2.3" sensor any day of the week.