The 5th Edition SRD Compendium can only contain information (such as race and class options, feats, spells, treasure, monsters, etc.) that is located within WoTC's recently-released SRD . If WoTC releases more SRD content under an Open Gaming License, you can count on that being added to the Compendium. However in terms of custom compendium content, I believe that it is certainly on the map as far as future expansion goes: Riley D. said: Kevin said: Very Impressive... but so many questions come to mind, but will start with the two big ones that jump out at me. ... Homebrew... This goes back to questions I asked when the compendium was first introduced, is it possible for individuals to have "customized" compendium content? ... On Homebrew, that is definitely an area we're planning to explore. I think ideally we'd like to allow you to "fork" the SRD and then have a private Compendium that you can edit to your heart's content. But it will be a ways into the future before we're able to offer that most likely -- we want to get the official SRD to a place that we feel like it's stable first.