Do you understand that this can be fatal for your coin?
Ethereum coin owners will immediately sell your coin and the price will be very low. Miners will not be interested in mining your coin, and you will have problems with 51% attacks, as was the case with Ethereum Classic
It could be fatal for the price of Ethereum 2.0 if 25% of the supply is sold to support the Ethereum POW fork.
Guessing the price at launch is impossible, but there are more than 1 million users with a balance is more than 1 ETH. Some will buy, some will sell.