Future 3rd Party Content Providers?

Summary

Are there additional 3rd party content providers on the road map?

Content

I swore there was a post a while back discussing if there were additional 3rd party content providers on the road map for integration similar to Open Sesame. But now I can't find said post.  Does anyone know if there are other content providers planned?  If so, what type of timeline? We are just in the very early stages of looking at purchasing 3rd party training content.  Ideally we'd like something that integrates (or would in future), but we have to consider multiple vendors, we can't exclusively consider Open Sesame.