So, since you were interested to hear how it all was supposed to end, here is a summary of how I had imagined the rest of the story to go. There is a few things I'm not sure if I would have kept and a few things I might have added if I had kept writing, but I this is roughly how it would have gone.

Once again, thank you for everything, I'm really grateful for all the nice things you have said and all the support you have given me. I hope this makes up for me abandoning this at least a little.

During the month that followed Percy's imprisonment on the Helicarrier, Loki releases Percy from the mind control and tells him about how Thanos, the Mad Titan, wants to take control over Earth, and that the only reason he hasn't attacked yet is that Loki still hasn't delivered the Tesseract to him. Percy, after initially being angry and hurt, agrees to help Loki find a way to protect Earth (and Loki himself) from Thanos rule, even though he despises the way the god treats his mind controlled friends. Percy sends Annabeth a message (after persuading Loki that it has to be done) and she agrees to meet him. Loki lets him, with the condition that he has to bring Alabaster with him.

The two demigods meet up with Annabeth, who have brought Piper with her. Piper uses her charmspeak and Percy, who is no longer protected by Loki's sceptre, falls under. Alabaster manages to send an Iris message to Loki before he too is brought down. The two girls bring the captured demigods back to the Helicarrier and they end up locked up in the same cell Percy has been kept in before.

The Avengers and their demigod companions try to get information out of Percy and Alabaster, desperate after a month without any clue as to Loki's whereabouts. Both of the demigods refuse to tell them anything, and Annabeth, Jason, Piper and Will worries about what Percy might have been through during his time as Loki's prisoner. Meanwhile, Percy tries to convince them that Loki isn't completely bad, that there's a reason behind all that he has done, but no one believes him.

Loki, furious after seeing Alabaster's message of the both of them being captured, sends a message of his own to the Avengers. If they don't bring Percy back to him he threatens to hurt the demigods that are still under his command. Annabeth, Jason, Piper and Will are horrified and asks Percy if this is really someone he wanted to keep secrets for, but Percy just turns his head away and stay silent. Alabaster wonders if the feelings between Percy and Loki might be deeper than he originally though, if the other demigod risks his friends being hurt just to make sure Loki stays safe.

Finally, Percy gives in and tells the Avengers about Loki and how Thanos will try to take control over Earth and why he has been defending the god. Thor recognises Thanos name and informs the others of who that is. They all decide to at least listen to what Loki has to say about it and if he is telling the truth, but since he won't meet them himself, they send Percy back, with one of Tony's trackers on him and ready to send an Iris message back to the Helicarrier with Loki's answer.

Loki refuses at first and Percy disappears of the radar for a while, worrying his friends. But after a few days of persuasion, the god gives in. He tells the Avengers more of Thanos and the threat he poses. It is decided that Annabeth and Thor should go to Olympus to discuss it with the Greek gods and see if they have a solution to the problem. In the meeting, Athena reveals that there is a library of ancient foes in Greece and that the information of how the Olympians first killed the Titans exist there.

Annabeth, Jason and Piper travel there and searches the library, but are unable to find a way to kill Thanos once and for all. Instead they find a way to hide away Earth from Thanos view with the help of the powers of the Big Three's children.

The Avengers, the demigods and Loki gathers in London, the place where the veil between worlds is thinnest. Percy, Jason, Nico and Hazel focuses their powers together, creating an illusion so powerful it will fool even someone as powerful as the Mad Titan. Unfortunately, realeasing that much concentrated power makes Percy loose control and he almost chokes all the people around him to death. Before he does that, though, Annabeth manages to stop him in time, but several people lies unconscious in the street. The planet is hidden, though, and they are safe from Thanos.

And then it's all over. Thor brings Loki back to Asgard, to make Loki stand trial and to warn Odin of the threat Thanos makes. The Avengers split up, Bruce going back with Tony to Stark tower. Percy goes home to his mom, the other demigods goes back to camp, all of them trying to process what they've been through. Will and Nico is reunited and Alabaster is given a chance to redeem himself so that he might be allowed back to camp as well.

Annabeth gets an internship at Stark Industries and she, Tony and Bruce starts to develop a monster rejector, a device which will mask the demigods' scent from monsters in the vicinity. Meanwhile, Percy is feeling lost and sad about losing Loki, he has tried to continue with his life but he still feels empty. But one morning he wakes up and finds a message on his nightstand, Loki is back and he is waiting for him where it all started.