On another forum, someone had the hypothesis that Discovery's magic mushroom pixie dust drive will cause it to begin shifting through timelines. The climax of the story will involve Burnham causing herself to essentially cease to exist (die in the attack her parents were killed in, or not be adopted by Sarek and be someone else entirely) resulting in the war ceasing to exist. As a plus, other changes to the timeline could explain all of the other continuity errors (e.g., the series could end with Klingons with hair).