One idea could be that the Supersonic Girl discovers a new power within herself, like the ability to time - travel. This could lead to her going back in time to prevent a great disaster from happening in her world. Another idea is that she teams up with an unlikely ally, perhaps a villain who has a change of heart. They could then face a common enemy together.
Definitely. The comic version of Homelander is portrayed as having greater strength and capabilities. This is evident in his confrontations and the scale of his power displays throughout the comic series.