Au, Harry and Percy suffer greatly from their separate wars. They individually join an American spying agency named S.H.I.E.L.D. Kraken (Percy) and Basilisk (Harry) become well-known legendary rivals within the agency until they are partnered together for a mission and realise that they are the perfect team. They decide to work together…but how well can they hide their secret pasts

So basically Annabeth transfers to Goode High (Percy's school) after the wars to surprise him yadayadayadaya...I know it's cliché but oh well. Meant to be a one-shot but can be continued if you want me to.

Nico accepts a dangerous quest from an ancient deity, even though Hades warns him that he may never be able to come back. The quest lands him in the future with the task of stopping the horrendous amount of deaths written by the Fates. Can Nico find Tobias and Tris before the events of the Divergent trilogy play out into the Fates' hands? SPOILERS

Percy, Jason and Nico (PJO) join the Legion of Chaos. Here they bump into the likes of Harry Potter, Katniss Everdeen, Elsa, Mulan, Sherlock, Merlin, Legolas...and just about every fictional character you can think of. Tartarus starts to rise on Earth so Chaos sends them to stop him by teaming up with the Avengers. If you don't know a character, you can treat them like an OC.

This is a fanfic I've wanted to do for a long time. What happens when good guys meet the bad guys? What happens when two lots of good guys meet two lots of bad guys? What happens when the bad guys are trying to steal the same thing? Gallagher Girls and Blackthorne Boys meet Kat's crew and Otto's crew in a crossover between the Gallagher series, Heist Society series and the H.I.V.E