The lesson
Mark every roadmap item with how committed it is, so a reader can tell a promise from a hope.
In this Pitch Unfairly rebuild of a 2006 Tesla roadmap, one slide reads "Now is committed. Next is planned. Later is a direction." Its three cards carry COMMITTED, PLANNED and DIRECTION with three, two and one filled segments; Later has a dashed border. The Next slide reads "DATE When the Roadster has paid for it" and "NAME Not yet".
Don't copy the blueprint styling or the Roadster specs. Keep the three-tier commitment labels and a goal slide that sits above the product list.