A new leak suggests that MediaTek is working on two new chipsets that use ARM's latest Cortex-A78 cores. It will likely succeed last year's Dimensity lineup and set a precedent for subsequent MediaTek releases in 2021. The hardware is expected to make its debut alongside a Chinese-origin smartphone in the coming weeks.
https://www.notebookcheck.net/MediaTek-reportedly-working-on-two-Cortex-A78-based-chips.500884.0.html