The “legacy sequel” is one of the most powerful concepts in Hollywood filmmaking right now, and one of the most profitable. The legacy sequel (legasequel?), often arriving many years or even decades after the original film was released, isn’t a reboot or a remake but rather a long-anticipated sequel that grapples with the film’s impact, fan base, and yes, legacy, while refreshing it for a new audience. It’s a way for studios to capitalize on moviegoers’ nostalgia and familiarity with certain characters and stories, while introducing new characters to keep it going. With the legacy sequel “Top …