We at EN Publishing have just launched our new System Reference Document project. Taking the rules of our popular Level Up: Advanced 5th Edition tabletop RPG, we are creating a fully-featured complete 5E SRD which will be available under a variety of open and permissive licenses, including licenses which are non-revocable.
We have already begun work with a crack team led by Paul Hughes. As we have already written and published the game itself, we are already well on our way.
We don’t know what will happen in the future regarding the OGL. WotC has just released its SRD into Creative Commons. The A5ESRD will be significantly larger and more complete, including feats, archetypes, and more.
(Note: this is a new SRD. The original LUSRD remains published on the official Level Up website and will remain available under the OGL for as long as that license exists; we do not believe the OGL v1.0a can be de-authorised, and we welcome the news that WotC has abandoned its attempt to do so).