Chen Jin, CEO of Lenovo China Mobile, spoke about this on his Weibo page. He announced that the new product will enter the market under the name Legion Phone 3 Pro and will boast a new top-end Qualcomm SM8450 processor. That is, we are talking about the Snapdragon 898 chip.
Recall that the new SoC, according to rumors, will be 20% more powerful than the Snapdragon 888. The processor is credited with the Adreno 730 graphics accelerator, the Snapdragon X65 5G modem and the 1 + 3 + 2 + 2 core layout instead of 1 + 3 + 4. Presumably, speech there is one Cortex-X2 core, three Cortex-A710, two Cortex-A510, and two Cortex-A510 (with a reduced frequency).
Unfortunately, there are no other characteristics and dates of the announcement of the smartphone yet. Most likely, the novelty will be shown in the first half of 2022.