Simply put, release planning is a process in which we determine what order we should implement the User Stories from the Product Backlog. Remember that our aim is to create customer satisfaction through early and continuous software delivery, the first Agile principle. When creating a Product Backlog, it's easy for it to become a bit of wish list. Blue-sky thinking happens as part of any requirements gathering process, regardless of the technique used.
Release planning allows us to prioritize the User Stories; the aim of prioritizing a Product Backlog is to surface the stories that will bring the most value and satisfaction to our customer first.
It's entirely plausible that your Product Owner has already prioritized ...
