DeAndre and Lemon are now the co-owners of the Future Foundation and doing an amazing job at it. Lemon only wears a mask now because he likes to and not to cover the identity of his family history, while DeAndre has accepted who he is and now knows his capabilities, sharing it to the world. He begins making new inventions, games and the like. With everyone's full support to them, the Foundation is growing as a new society that will progress the rise of a new era in the world.
The world will live on. Population is now very low, and only a few people are left to enjoy the lives that we have. But hey, at least humans aren't extinct because of a girl leading everyone to despair. The Earth will rise again someday, and it will rebuild anew. This is the "Post Despair" era, and I can tell you, the Earth will probably never be tormented in despair again. It is in good hands.
Whatever happens, hope still prevailed. And that is the story. The story of when the Earth was troubled and miserable. It has ended, as a happily ever after. So what lesson do you come out of this? Have hope. As long as you have hope, you can do anything. Do you think that they can save the world without hope? Of course not. Hope is where success thrives in.
And for us? Well, this is the end that we deserved and earned.