If they publish content for wizards systems without any license, then it will go to legal you would imagine.
Again, its not intended for WoTC; Paizo et al will be using it to publish content for Pathfinder, Black Flag, and whatever other systems people make that choose to adopt it and release corresponding SRD-equivalent documents. I highly doubt WoTC would want to pick it up for D&D, as it would mean people could create and use content out of the closed ecosystem they're going for now with DDB/OneDND. At this point people's concern is _replacing_ D&D in a legal/trademark sense and cutting out WoTC, not coaxing WoTC into not fucking with it; that clearly went nowhere after the OGL1.1 leak.
If people believe that DND is popular only because of OGL and those other big publishers (and if Paizo put their money where their mouth is) then I guess we will have an answer soon enough.
Probably would have died off post-TSR if not for the OGL and SRD, yeah. Wizards never released their own tools or accessories for anything. Everything good came from other people. PCGen never could have existed, or would have been useless. Lots of monsters have never had official minis, and even for the official ones there's never been a way to buy the ones you actually wanted. Fortunately we have Heroforge now, but that couldn't have existed (or at least used D&D-compatible races, monsters and items). Hell, even DDB probably wouldn't have existed as WoTC would have had to do it themselves rather than buy it after the fact. And for sure we wouldn't have actual play groups like Dimension 20 and Critical Role or TheVaktare out there creating the content they do.
Without the freedom afforded by those licenses around format conversion, we never would have had the great experiences playing remotely enabled by VTTs like Fantasy Grounds or Roll20 or Foundry. Or at least we wouldn't be able to play D&D on them.
So maybe someone out there would still be playing it with paper and pencils and a greaseboard, but I don't think it'd be the TTRPG cultural touchstone it is today if it'd never been opened up for third party creators and tooling. I assume it'd be more like what the AD&D community is today -- a small group of dedicated diehards keeping to 30-year-old content like Tomb of Horrors.
I think you have some hyperboles in your comments about DND, and honestly its part of the problem I see everywhere.
I mean, it'd be nice if I didn't have to worry about it. D&D is how my circle of friends relax and have fun, and a sudden drop that a short-sighted corporation might be killing off my favorite hobby because they're confident they can make 10x more revenue with 1/10th of the subscribers in pay-to-play schemes was not what I needed to start off this year.
While I'd love for WoTC to be like "yeah this was a terrible idea , the more time I spend looking into this, the less confident I get that'll happen. When the news dropped, my first thought was "Wow this is like what Microsoft would do if they suddenly came into owning D&D". Sure enough, turns out Cynthia Williams, made head of WoTC last year, is an ex-Microsoft manager...