We need to:

1. Create the bump logic in the cdk-release tool for unstable modules. The exact logic of the version bumping depends on the questions answered in Finalize the versions of the unstable modules in V2 #15581.

   The probable implementation is creating a version.json file in each directory of the generated unstable package with the current version, and bumping it if already exists.

2. Modify the build of the alpha packages to take the version from the above mentioned file.

3. Change the align-versions script to use the version from the above mentioned file to change the actual versions in package.json to the stated version.

4. Add logic to the cdk-release tool that generates the individual Changelogs, and possibly integrates them with the master V2 Changelog.