I'm not 100% sure I'm following, but I don't *think* you have anything to worry about. It's just not quite how the documents function, their inclusion doesn't itself convey a right, their inclusion is a condition of the rights being exchanged, if that makes sense.
Viewing post in Publishing with the OGL and You
This is my primary concern. Under normal copyright law you can use copyrighted material under certain circumstances related to 'fair use'. Under 'fair use' doctrine it must not be word for word copy unless it is very limited, like a quotation, and then must have proper citation and attribution. So if I was making a dungeon crawl game that was compatible with D&D but not an actual copy there would be no problem stating that it was D&D compatible as long as I provided citation and attribution to WotC acknowledging their copyright, tradename, trademark, etc. Under the OGL 1.0a I can actually use the SRD 3.5 word for word, but I CANNOT provide citation or attribution back to WotC other than through the OGL itself which prohibits me from even mentioning the product identification.
Now I don't make anything that is directly derivative from the SRD 3.5 other than a few components (monsters and stat system which I state are from the SRD 3.5), but I do use Microlite20 and Microlite2020 components that are also not derivative of the SRD 3.5. However, some parts of Microlite are derivative, but I don't use those parts, only the parts that are unique to Microlite. So I need to include the OGL for those limited parts that are derivative from SRD 3.5, but what do I do with the Microlite portions that I am using that are not derivative of the OGL or SRD 3.5? Under standard copyright law all I would have to do is provide a brief description of what I am using and attribution for Microlite. Or does Microlite fall under the OGL because they used the OGL themselves??? A real nightmare.
I think I can rely upon the OGL 1.0a for past efforts since at the time it was clearly an authorized license. But if I want to create something new in the future that uses nothing from the SRD 3.5, but does use some components from Microlite????? Ahhhhhhhh.
I believe I have an answer to my question.
Under the OGL 1.0 or 1.0a, if I choose to use it, I have the right to use the Open Source Content material (the SRDs) word for word if I want to. What I give up in exchange for this right, creating what is an enforceable contract IMHO because that means there is consideration (or a mutual exchange of value of some sort), is giving WotC more IP property rights over the branding, name, non-Open Source Content, etc. than it would otherwise have received under standard copyright law and other IP laws. Also, by including the OGL 1.0 in my work I voluntarily make my work, which may contain unique and potentially protected material not derived from the SRD part of the a chain of Open Source Content that always leads back to WotC. So those elements of Microlite that are NOT derivative from the WotC Open Source Content are all the same now Open Source Content covered under the OGL 1.0.
That is some powerful consideration in favor of WotC and IMHO makes the OGL 1.0 and 1.0a an enforceable contract that cannot be unilaterally amended, revoked, or 'unauthorized' by WotC. All the same that is just my opinion. I think I will wait until a court issues a more binding opinion in my favor, preferably without me being a part of the proceedings, before I continue using the OGL 1.0 or 1.0a.