Nice ending there, felt a bit rushed in the last few pages, but that would set it up for a nice lil extra if they felt like it or not. They could have dragged out the last part more to remove some of the rush feeling, but it still ended well before getting to the point of "okay, now they are just dragging it along"
Could easily see it as the end, a new season starting with a new crisis/event, or even a story of descendants etc. This still had a nice ending although lil rough with "wait wha... 'powers? sure whateves now".