All Hope Lost 
Three years. That's how long Percy Jackson has been missing, this time of his own free will. Three years. The Avengers have all but given up hope on finding him, and are now going their separate directions, while his Uncle works furiously to right his past wrongs. When all hope seems lost, and there's no light at the end of the tunnel, someone lights a match, and a blaze of hope is lit on the horizon.
Faced with an unbearable decision, Percy Jackson must once again, defeat past enemies in hopes of a peaceful live that his kind may never have. In a desperate bid for help, he turns to the one person he swore to never again contact. Tony Stark, his uncle. His return is not without changes however, the majority of them being in himself.
Trying to defeat an undefeatable evil while at the same time keeping his secrets in the dark may prove to be too much for the mighty Savior of Olympus, as things about him came to light though they should've been left in the dark. Plagued by actions from his past, and a feeling of dread he can't seem to shake, he must once again be the hero this world needs.
The Savior of Olympus now has one more title to add to his long list.
Champion of Oblivion Coliseum.