Percy Jackson and the Avengers crossover

Percy wanted a break. First, he had to fight in 2 wars, with him being one of the main heroes in them. Then, when Chiron finally let him and Annabeth go on a small date outside the camp barriers, he and Annabeth had to get kidnapped by a group of "heroes" called the Avengers. Of course, Percy had no idea who they were or why they wanted to kidnap him and his girlfriend. As far as he could tell, they were just human, not any type of monster...