While the The Great season 2 ending seemed prepared to provide a peaceful resolution, the final minutes add a complicated twist to the ending that needs to be explained. The sudden twist ending in The Great season 2’s conclusion is not entirely unexpected in retrospect as it follows a similar pattern to the closure of The Great season 1. The Great season 2 started four months after the events of the first season and concludes Catherine’s (Elle Fanning) coup against Peter (Nicholas Hoult) to take the Russian throne as she forces him to sign papers of abdication.
https://screenrant.com/great-season-2-ending-explained-surprise-twist/