In an alternate universe of Marvel and the Riordanverse co-existing it would be extremely likely for him to have slept with one if not several Goddesses and therefore have demigod children. Also Tony is well-connected and schist, right? Imagine Piper inviting her demi-god friends to a Christmas party her dad is hosting to make it bearable and Leo almost faints because "oh my gosh that's fricking Tony Stark." Annabeth tries not to make a fool of herself while desperately wanting to meet THE Pepper Potts, because "Oh My Gosh Percy it's Pepper fricking Potts!" Jason is clueless "What's the big deal? Who's Tony Stark?" and Leo is appalled and offended beyond everything because "You did not just ask me that you uncultured swine what do you mean 'Who's Tony Stark?'" If someone writes a fanfic about this I will read it.
