The seven are dead, Annabeth is dead, his parents are missing.
Percy is given the blessing of The Olympians and joins SHIELD as an agent. Set in first Avengers movie, Agent Jackson is a cold-blooded killer, skilled assassin, accomplished spy along with Natasha Romanoff and Clint Barton. Maybe Percy x Natasha. Don't read if you haven't watched the Avengers Movie. Direct plot input.
I am not a 50 year old troll who leaves cliffhangers or a team that makes a ton of comics. I don't own PJO or Marvel *sniff* *sniff*