Update next steps in explainer

- Fix link to Supersim
- Add link to predeploy

Author: zainbacchus

pages/stack/interop/explainer.mdx

@@ -211,7 +211,7 @@ flowchart LR
     A <--> C <--> E <--> B <--> D <--> A
 ```
 
-Each blockchain in the Superchain interop cluster shares the same security model to mitigate the weakest-link scenario. As outlined in the [Standard Rollup Charter](https://gov.optimism.io/t/season-6-standard-rollup-charter-ratification/8135#p-36758-governing-policies-11), these chains share the same L1 `ProxyAdmin` Owner. Any changes to the Superchain interop cluster must follow the standard Protocol Upgrade vote procedure—the established governance process for Superchain modifications.
+Each blockchain in the Superchain interop cluster shares the same security model to mitigate the weakest-link scenario. As outlined in the [Standard Rollup Charter](superchain/blockspace-charter), these chains share the same L1 `ProxyAdmin` Owner. Any changes to the Superchain interop cluster must follow the standard Protocol Upgrade vote procedure—the established governance process for Superchain modifications.
 
 {/* 
 ## Interop assets
@@ -226,6 +226,7 @@ This means ETH and ERC-20s can seamlessly and securely move across L2s, and inte
 
 ## Next steps
 
-*   Want to learn more? Read our guide on the anatomy of a [cross-chain message](cross-chain-message) or check out this [interop design video walk-thru](https://www.youtube.com/watch?v=FKc5RgjtGes).
-*   Ready to get started? Use [Supersim](supersim), a local dev environment that simulates interop for testing applications against a local version of the Superchain.
+*   Watch this video that gives an [overview of OP Stack interoperability](https://www.youtube.com/watch?v=FKc5RgjtGes).
+*   Learn more about the [predeploys that have been added to the OP Stack to enable interoperability](stack/interop/predeploy).
+*   Use [Supersim](stack/interop/tools/supersim), a local dev environment that simulates interop for testing applications against a local version of the Superchain.
 *   For more info about how OP Stack interoperability works under the hood, [check out the specs](https://specs.optimism.io/interop/overview.html).