Arbitrum Orbit is one of the stack that allows the layer 2 and layer 3 chains on the ecosystem. It allows you to use the third party roll up services and it would let you deploy the new chain. Now this tech is integrating with the Injective's EVM which makes it easier to deploy to the Cosmos and Solana chain for the layer 2 and layer 3. This new update would add more chains which also includes injective and arbitrum too. 

As the injective is making use of the Zk protocol and also there are chain deployment options available as well. The injective's EVM supports optimism, polygon, zk stack and few others. As the injective and arbitrum already has the support for all of this in deployment so new chain deployment in the layer 2 and layer 3. 

Orbit is also partnering with the Octane Framework of the Omni network. There is a long post on twitter on how the octane works. A lot of interesting things are being developed and as they integrate with the Orbit and the inEVM that would be accessble too. Lot of interesting things are in the cards let's see how that would work out for the layer 2 and layer 3 chains. 

You can check out the Arbitrum Orbit.