Move over Galaxy S, Galaxy P is here. At least, this is what an increasing number of leaks say. The series is purported to kick off with the release of the Galaxy P30 and P30+. It is also possible that one of them will come with in-display fingerprint reading, and will follow the trend of color-gradients for back panels.
https://www.notebookcheck.net/Rumored-Samsung-device-could-be-first-to-get-Galaxy-P-series-name-and-graded-color-scheme.335594.0.html