Miles, I don’t believe so at this time. For now I might suggest managing both sprints and the WBS for the features you need. Right now they are mostly separate methods to manage a schedule, but both can be managed if you need features from both. You can use Gantt views with Sprint and Sprint Start, and even some calculated fields to compare the two versions. In my opinion, Microsoft will continue to enhance the ability to do both, but until then you’ll need some double entry/checking. Hope that helps.