In the preview, Vincent D’Onofrio’s Wilson Fisk, a.k.a. Kingpin, asks Charlie Cox’s Matt why he stopped being a vigilante, to which Matt responds, “A line was crossed.” While Matt doesn’t provide any further context,

Created by writer Bill Mantlo and legendary artist George Pérez, who shared the hero's Puerto Rican heritage, Ayala was a street smart vigilante who used the power of three so-called Jade Tiger amulets which originated in Iron Fist's heavenly city of K'un-Lun to gain superhuman strength and agility.