You might want to watch the Twitch Stream that Roll20 gave yesterday. My impression was that such things have been waiting on some technical hurdles and licensing difficulties that are very shortly about to be resolved. Note that Roll20 is very careful not to promise or announce things that aren't pretty much in the bag. They announced a new tool called the Charactermancer that will be available for testing to Pro users (like yourself) that will allow you to build characters using structured data. Although no official statement was made, the implication was that much licensing has been awaiting a more controllable data model.My takeaway is that several notably absent rule books will become available shortly thereafter. This was my interpretation of the announcement. Take a look and see if it helps answer any questions.