We have a lot of work in our project backlogs (probably a few years worth!), and don't have the time to plan out all the backlog items into sprints in order to roll up into a plan. Is it possible to build a plan that doesn't necessarily rollup the dates from the start and end dates of individual stories to show on the timeline, we just want to show the timeline based on estimated project start and end dates, not an aggregation. Is there a way of doing this please? The plan wizard seems to require you roll up from spaces/projects, boards or filters, which we haven't scoped out yet.