Hunter X-05 takes on the alias of actor Brad Wolfe, whose latest film is "The Zaniac." In the comics, Brad Wolfe was an actual actor who was possessed by a demon and became the Zaniac. A poster for the film features the Zaniac in its comic design.
One of the posters at the Leopold Theater is for "Saraush Ke Putra", which starred Kingo from Eternals (2021).
One of the posters at the Leopold Theater is for "The Phone Ranger." This was a superhero who could use phones as weaponry and debuted in the Marvel Comics in 1985.
Dan DeLeeuw had previously worked on The Mask (1994), which in that film was considered an incarnation of Loki. (In the comics it was simply a magical mask.)