Will is be US-based like Mozilla, or will it be somewhere else, like Europe?
A couple of foundations have moved away from the US in recent years, for example the Eclipse Foundation (Belgium) and the RISC-V Foundation (Switzerland).
It seems foundational (if you'd forgive the pun) to know under what laws the foundation will operate, and who (if anybody) will be excluded from taking part in the project because of sanctions regimes.
https://en.wikipedia.org/wiki/Rust_Belt
One hundred years from now, nobody would suspect that the original meaning of the term "Rust Belt" had something to do with industrial decline.