Álvaro: what is your rationale for doing this? If you just want to strengthen the postgres community, just be a part of it then use your company and foundation to promote it. Why the need to own trademarks?
It seems like you have some other reasons to do this? Have you had trouble using the postgres trademarks in something you've been trying to do? Have you had trouble with the existing governance structure?
In your posts you bring up a lot of hypotheticals, about how postgres claims to be something but is allegedly not that (through its legal structure). Why is there a need to change that? Other than theory.