Zero-knowledge proof is one of the most active development spaces of the whole industry. This news is quite fresh:

Ethereum zero-knowledge proof scaling system zkSync Era has unveiled its answer to Optimism’s Superchain concept in the form of ZK Stack.

It’s a modular framework for a series of ZK-powered custom blockchains called Hyperchains, which will operate as a new layer on top of the existing layer-2 protocol.