When creating a pull request in BitBucket, I want to also initiate a Crucible peer review. I want Bitbucket to prevent the merge from completing until the peer review is completed. 

There is a plugin that accomplishes this: https://marketplace.atlassian.com/plugins/com.mohamicorp.bitbucket.plugin.crucible-review-hook/server/overview 

However, this is a really basic feature of Peer Review\Source Control technologies that I expected to be included when I bought Bitbucket and Crucible and created the application links. I'm disappointed that I have to spend more money to get a third party addon to accomplish this.