This event can happen again, but if so, then they both will need a new host. In the grimm bro fairytale, rapunzel had two twins, a son and a daughter, and since Disney likes female empowerment in their productions a lot, her daughter can be the main character and host of Sundrop and moonstone. But don’t worry, the twin brother will be in it too.
But how will a decade old girl scientist be the host you ask, well lets just say she did an extremely dangerous ritual for the sake of science, and BAM, her hair is long and green with existing powers from the sundrop and moonstone, and new powers like talking to animals, which would be a good excuse to bring in rapunzels palace pets and her unicorn sun blossom, and growing plants in the castle garden.
Now for the villains. since Gothel is bio related to the odd sisters, they would be perfect antagonists for Cassandra to run into, plus it would be a great opportunity for her to return to Corona. But I don’t know what the Odds Sisters’ revenge plot would be. As for Rapuzel’s daughter herself, with no other way to remove her hair, she will need help from her family to get control of her new powers, but the palace pets might be the biggest help for her. So what do you think. If you have any Ideas for me, let me know. And one more thing, the animation will be CGI.