Heh, chomping at the bit to stroke his ego is exactly what a lot of posters are doing. If Pelosi insisted on going, there is no realistic way for China to stop it. As China has mentioned before, the response to this change to the status quo would be to further change the status quo to its benefit. Whether that means regular intrusions of Taiwanese airspace or territorial seas or a full on invasion, I don't know, but it'd be absurd for China to start a war with the US as a knee jerk reaction rather than at a time of its choosing.
I don't think they want all out war.......yet. But they could push things close to edge so it would make this kind political stunts more unpalatable to the U.S. the problem now is that the U.S. military has to be now not only on edge but also interpreting every single Chinese move so a missunderstanding doesn't lead to a shooting war. All of that because the vanity of an old witch.