Qualcomm is said to be working on the successor to the Snapdragon 888 processor already, which is to be based on an advanced 4 nanometer (nm) process. Now, a famous leaker asserts that not only is this SoC's Plus variant also being planned with the same spec in mind, but that it will be made by a different supplier to the 895.
https://www.notebookcheck.net/Qualcomm-splits-Snapdragon-895-orders-between-Samsung-and-TSMC.548835.0.html