(at around 1h 1 min) During a flashback Frank Castle (Dolph Lundgren) has about his family, his daughters are both wearing Spider-Man pajamas. Director Mark Goldblatt did this to pay homage to Spider-Man. The Punisher first appeared in The Amazing Spider-Man #129, dated February 1974.
A sequel was briefly announced at the Milan Film Market in fall 1990, despite the fact that the new owners of New World Pictures weren't interested in theatrical films. The sequel was never further developed, and Dolph Lundgren was not willing to reprise his role after his disappointment with the final product and its release.
Despite an unfounded rumor that Marvel didn't grant the filmmakers the use of the skull logo, the comic book company actually supported the production of the film and was involved (figures such as Stan Lee, Carl Potts, and Tom DeFalco served as consultants), but not as much as they would since the 2000s. At the time, Marvel was actually owned by the production company New World Pictures, who had bought the comic company and their characters a couple years prior.