ETH 1.0 will be forked into a new chain to preverse proof of work before it gets merged into ETH 2.0
Core Developer / Rémy Roy
Miners or a community of people loosely associated with miners will fork ETH 1.0 to preserve proof of work (PoW). They will do so before ETH 1.0 gets merged into ETH 2.0. This will create a brand new chain.