Will Claude Opus 4 be officially revived/undeprecated/unretired/brought back before 2027?

Opus 4 being unofficially available on e.g. Bedrock doesn't count.

It counts if it's only available by filling out a form like Claude 3 Opus is, as long as the requests actually get approved.

https://platform.claude.com/docs/en/about-claude/model-deprecations

Here it is