There exists a universe where Teen Wolf and the Marvel Film Universe exist in the same timeline. In this universe, werewolves are the children of Fenrir and witches can use magick as they are descended from demigods, a child born of a human and an Asgardian. What if Stiles were not only a witch but a Demigod? The demigod son of Noah Stilinski and Hel, the Goddess of Death and Queen of Helheim( Hel's kingdom in Niffleheim, the Underworld), Stiles can also commune with the dead. What if the Dread Doctors were a special branch of Hydra? What would Coulson do if he heard the Dread Doctors were in Beacon Hills and sent the Avengers to protect Stiles, his nephew? This is up for open adoption if anyone's interested, just let me know. You can pretty much shape the story to your style but also explore the possibilities of Stiles becoming romantically involved with either Thor, Steve, or even both if you want.
*Random fact but not important to this fanfiction unless you want to mention it: Merlin is so powerful because he is the demigod child of Balinor the last Dragonlord, Hunith, his human mother, and Odin, King of Asgard. As the demigod child of Odin, and thus an heir to the Asgardian Throne, Merlin was given the longevity all Asgardians possess.*