This has been discussed at length in various threads including I think this one.Riddle me this, legal minded peope. Suppose that:
In 2022 "Toadstool Games" (TG) published "Forest of Fancy" (Fof), an original RPG where you play intelligent furry animals. TG also publised an SRD for FoF as Open Gaming Content under the OGL 1.0a.
Then in late 2023 "Greenrock Games" (GG) publishes "Sea of Serenity" (SoS), a 3rd party expansion for FoF with rules for aquatic animals. It includes a fair amount of text directly taken from the FoF SRD.
TG then sues GG for copyright infringement, claiming the distributing TG's copyrighted text without a valid licence, as the OGL1.0a was supposedly "deauthorized" by wotc earlier that year. GG doesn't deny copying TG's content, but maintains that their licence is as valid as ever and the "de-authorization" is invalid. GG starts a GoFundMe to cover legal costs and raises enough to hire an expert law firm.
To resolve this the court will have to rule on whether or not the OGL 1.0a has been "deathorized" or not. Will this set precedent in case wotc later starts a similar lawsuit against a 3rd party D&D publisher?
WotC is not a legislator. It has no power to change the contractual relations that exist between TG and GG.
If TG and GG have promised one another that they must from time-to-time reproduce a bit of text (ie the text of the OGL v 1.0a) in which WotC claims copyright, then they are risking copyright infringement if they don't have WotC's permission to do that. Other posts and threads have canvassed the various plausible arguments that WotC has expressly or implicitly granted such permission.
No it won't. Solving a dispute between TG and GG won't require a court to form any view about what legal relationship exists between WotC and those who purport to have licence agreements with WotC.To resolve this the court will have to rule on whether or not the OGL 1.0a has been "deathorized" or not.
EDIT: At the same time @S'mon was XPing this post I was XPing his post not far upthread which says much the same thing!