This. I'm not sure why they didn't learn this lesson on Alice Through the Looking Glass. Even though they both made a lot of money, neither the original Alice nor Maleficent seem to be particularly well-regarded in a long-term sense, and both of their sequels arrived after a long delay since the first one. The combination of those factors seem to have killed any appetite that might otherwise have existed for a sequel. I don't want to brag, but I've expected Maleficent 2 to seriously underperform for these reasons basically since it was announced, so I'm not quite sure why Disney didn't see it. Incidentally, both films in the Alice and Maleficent series share the same screenwriter, Linda Woolverton, who had a much more lasting impact for Disney with her scripts for the original Beauty and the Beast and Lion King back in the '90s. Maybe she should go back to writing more animation?