According to famous leaker Ice Universe, the Exynos 9820 will integrate Samsung's upcoming Mongoose M4 cores which are said to be better than the ARM Cortex-A76 chips. This should translate into frequencies that go over 3.3 GHz, and, since the M4 are 7 nm chips, they should have improved energy efficiency.
https://www.notebookcheck.net/Samsung-Mongoose-M4-core-specs-leaked-expected-to-perform-better-than-Cortex-A76.308410.0.html