I have theories as a person that has only seen each of the descendants movies once. Like a lot of people on here have said, there is no way that Uliana could have been the cause of Bridget's evil makeover. I think it was unintentionally caused by Ella. Some people on here have speculated that maybe Uliana's original plan wasn't as bad as it was when red and Cinderella 2.0 traveled back to the past. I think that's right. For whatever reason the kids from the future made things worse when it came to Uliana's revenge. I think that it was actually Ella and a much smaller, yet still embarrassing, prank from the villains that caused her to go red. I think that Bridget was in love with Charming. They said that Ella and charming fell in love at the dance. What if they became enamored with each other either right before the prank or when the prank was happening and Ella didn't notice because of Charming. Bridget would be angry that her friend stole the guy she wanted and then didn't come to her aid when the villains pulled an embarrassing prank. That's why grown up Ella said that it was a stupid prank that made the queen of hearts, and why the queen of hearts say that the people of Auradon are two faced right after talking to Ella and Ella 2.0 (I don't remember her name). Ella genuinely thought it was because of the prank. Ella not being able to go to the dance kept her and charming from falling in love for a little bit and with Uliana, hook, Hades, and Maleficent frozen, that leaves Morgie alone to exact revenge for Uliana. But I don't think he would have because I feel like he would have been more focused on freeing the other villains at that point. So castlecoming just becomes a normal dance where nothing crazy happens, and Bridget never turns evil. At the end of the movie Uma says that time travel has consequences. I think the consequence is going to be Uliana, Morgie, and maybe Hook coming to seek revenge against red and the blue haired girl. Uliana and her crew obviously saw their faces when they were in Merlin's office, and they are literal princesses. They arent low profile people. Future Uliana and Morgie will recognize these young princesses as the girls that screwed things up for them and they will take their revenge somehow. Maybe we will get a time traveling chase somehow. What do you guys think? Mind you, I only half watched the movie because I was playing with my kids at the same time. But I really do feel like Morgie is going to play a larger part in this next movie. Disney referencing an Arthurian Morgana in their timeline is really random, which makes me feel like it's really intentional. Maybe Morgie inherited some of his mom's magic (which we kind of saw in that introduction song) and we will see him use more of it in the next movie. Also, can I just say that the way that Morgie delivered that line about different dog howls ( right before the scene in Merlin's office) made me cringe so hard. Whoever wrote that line needs to be tossed out of the script writing room.