Here's an idea I've got for the Chosen Ones in one of the many 'Evolution Arcs' as evolution is a common thing in the series. I wanna hear from you guys if its a good one, I'll probably post my Evolution Arc ideas here and see if you think they're good.
An ancient being from the destroyed planet of Omega-Deus comes to planet Eden (Our heroes' home world) during the time of World War III unknown to the people on it. He decides that the planet will be destroyed when he returns a half-century later with Omega-Deus' power at his side. When he returns he announces the destruction of Planet Eden. Saint Queen Aura, Star King Charge, and Dark Queen Infra tell him the world has no longer been a zone for hate and anger, and that if he destroys Eden no more new planets can be created. The Ancient Being does not believe what they're are saying as he saw the destruction 50 years ago. Having no choice, Admiral Nova sends the Legacy of Heroes to stop the Ancient Being. When the Ancient Being sees the power they possess, he uses strategy to make them unable to fight them. He tells them that if they can fight him in space with no protection he will accept their challenge. Even though they have evolved since they were humans, they don't have the ability to breathe in space. But Alicia, despite knowing the danger of dying if she stays in space to long, goes to protect the planet, which shocks the Ancient Being. As she goes into space, she starts choking because of the oxygen-less void of space. However, Khaos, seeing Alicia's determination gives them the power to evolve into their next form. Using it, Alicia and the rest of the Vicans evolve into Arcans, and now they have the power to breathe anywhere. The Ancient Being believes this is a fluke and fights Alicia, but with newfound strength Alicia and her friends manage to defeat the Ancient Being and destroy it. Now the Legacy of Heroes are one step closer to their ultimate evolution.