Well, anything can happen... Let's discuss the option of "trying to aim our weapons and detain him peacefully, and if he doesn't agree, we attack as a priority." In principle, we don't lose anything compared to the option of "just attacking," although it will likely rule out the peaceful option. Essentially, it's close to what I suggested from the beginning, although it doesn't seem as relevant now, considering how much time has passed and that we have -50 relationship points.
Where do we end up when we save the world?