NarutoxPercy Jackson

Naruto is immortal because when he sealed the shinju in him he absorbed it and he became the primordial god of creation, destruction and chakra

The ninja era was before the titans as well

He's eons old he lived through the titans and gods reign of the world

He majorly changes the story of percy jackcon

He's sarcastic/calculating/sadistic to his enemies/smart

He meets percy Jackson and gang during SoM (sea of monsters) on calypsos island

He's married to calypso (you can give him kids with her if you wish to

Not harem allowed

Has every jutsu scroll from every village as well as all the legendary blades of that time

No one knows who he really is except calypso