Teen is actually Wiccan

Let’s get that one theory out of the way first. John Locke’s unnamed character, only referred to as “Teen,” is actually Wiccan. Also known by the name of Billy Kaplan, Wiccan is one of Wanda Maximoff’s sons. We’ve seen Billy before in the MCU on WandaVision, where he even demonstrated his own magical abilities. But by the end of the show it was revealed that these versions of Wanda’s kids are a creation of her own twisted reality. However, that doesn’t mean Joe Locke isn’t Billy. We’ve seen multiversal madness and lots of temporal shenanigans across the MCU and with magic, anything is possible.

Agatha All Along is also heavily implying that Locke is Wiccan, to the point that it’s almost an accepted fact for viewers. Teen claims he broke Agatha out of her curse, a feat she is impressed by considering it means he was able to contend with the Scarlet Witch’s magic. That could be an easier task for someone related to her. From a costume design perspective, Teen already looks like he’s casually cosplaying Wiccan, with the gray sweater and dark pants easily seen as an homage to the outfit Wiccan wears in the comics. All we’re missing is a big cloak, though in some ways Teen’s hoodie isn’t far off. Oh, and there’s also the slight matter of a subtitle on a trailer referring to Locke’s character as Billy. This seems like an open-and-shut case.