What If the Free Basic Rules WAS the SRD and What If WotC Already has a System in Place to Distribute 3rd Party 5e Products?
Think about it.
Everything beyond what will soon be in the freely distributed Basic Rules for 5e is, essentially, optional. If the core books are optional, they do not constitute the SRD.
Official adventures from WotC will use the Free Basic Rules - anything else required to run the adventure will either be included in the adventure book itself or available as a free download.
The SRD would include character generation rules, making it not just a System Resource Document, but also a full set of playable rules. Being available as a downloadable PDF, I suspect it will be updated and added to over time.
With the relationship WotC has with OneBookShelf via the DnDClassics webstore, I suspect it wouldn't be too hard for them to distribute the rules as a print on demand softcover or hardcover if the demand were there.
It also means WotC could have a system in place to distribute 3rd party 5e products under a controlled license through the DnDClassice webstore, and take a percentage of sales right off the top. Probably better than the GSL, not a loose as the OGL and ensures WotC gets a piece of the pie. Larger publishers could probably purchase a license to publish directly and not go through the WotC webstore.
The Minotaur for Old-School Essentials
*Requirements:* Minimum STR 9, Minimum CON 9
*Prime Requisite:* STR and CON
*Hit Dice:* 1d10
*Maximum Level:* 8
*Armor:* Leather, including shield...