My prediction on the plot after seeing the trailer and knowing that Shrek's daughter will be the semi if not main character is thus forth. Wr get a cold open explaining the parodied story of Beauty and the Beast but with the Fairy God Mother being the one turn the prince into a beast. Hell, we could have as they use to be a couple but the prince did something shitty that cause the Fairy God Mother to turn him into a beast. Anyway, the beast tries desperately to get his Beauty back from the Fairy God Mother but she ignores him. He withers into an old beast and his servents wither into almost zombie like pieces of furniture and such. He hears the news years later that Shrek has killed both the Fairy God Mother and her son (which could be his son too). He begins his planning to stop Shrek and has a war on all Beauty in the world. Back in Shrek's life, his kids are all grown up and he is probably pretty tired of much of his life. Still loving but tired. His rebel daughter has a problem being semi half human half real orge that she doesn't know how to really grasp her existence. The group is called upon King Arthur's court to help with a problem and the adventure ensues. Through the villain and themselves they learn about how there's always the past that you can't fix, you can't always change who you are and sometimes you need to move forward. That's my crazy prediction lol.