There is no chance the license changes. Matt has been a very,
very vocal supporter of GPL.
This self-described war he’s going on is all about commercial trademarks, and other hosting companies having more commercial success than Automattic in the ecosystem while contributing fewer developers and less money to the project.
Now, he’s taken it to a very extreme extent, and I fully disagree with his approach, but the core issues (for him) have nothing to do with GPL and how the WP project is governed. Those has even the same for decades, and he’s not trying to change them.
He’s just being very self-destructed because it turns out the community has no interest in some kind of “war” that gets long term contributors locked out of the ecosystem. He was expecting more people to be on his side, and frankly now seems to be lashing out (by blocking people) when that didn’t happen
None of that means he’s trying to change the governance model or license.