Next.js won't require a Deno backend. You can define backend data fetches [0] along with the UI Pages and routes for an API [1].

Of course the NextJS application could call out to a Deno backend as well, but the external app is not required.

- [0] https://nextjs.org/docs/pages/building-your-application/data... - [1] https://nextjs.org/docs/pages/building-your-application/rout...