Percy had been kept behind enemy lines. Hydra lines. Hydra found Percy to be an adequate subject and started testing things in him. They wore him down and broke him. What happens when the new Percy meets the Avengers? (This starts a little before Age of Ultron and continues through that timeline). DISCLAIMER: This will be said now, and only now. I do not own any character of Percy Jackson nor the Avengers. Those rights go to Rick Riordan and Kevin Feige(?). BUT, like, half of the plot is mine. (Y'know. Otherwise how else did Percy get there?) Most impressive rank: #1 in the 'percy' tag