A new leak has confirmed that the MediaTek Dimensity 2000 and Snapdragon 898 will both use ARM's new V9 architecture. This confirms the presence of X2 and Cortex-A710 cores on the upcoming flagship chipsets. Enthusiasts will also be glad to see the introduction of Cortex-A510 cores over the aging Cortex-A55 cores on current SoCs.
https://www.notebookcheck.net/MediaTek-Dimensity-2000-and-Snapdragon-898-to-feature-ARM-s-Cortex-A710-and-Cortex-A510-cores.575632.0.html