Continuity connections to previous films & utilizing the series' leitmotifs in order to deliver thematic context non-verbally is effective.
Yes, that technique
ALSO touches on audience nostalgia, but I think saying they're being "weaponized" is an exceptionally clickbaity way to frame that. Part of having an iconic and identifiable soundtrack is connecting elements of a film to an audience non-verbally, and basically any sequel whose soundtrack was really good does that, regardless of how long it is between sequels: You're gonna hear the
Terminator theme for any new
Terminator sequel, but the
Lord of the Rings films used leitmotifs in the same way even for their one-after-another sequels. Drawing connections between the events in a series when there are large time gaps between them is pretty typical for ensuring that your general audience understands the context, but also so that your devoted audience has connection points that matter to them as well.
A vast majority of all marketing is mostly all fear-based. Any type of marketing is using something that's cognitively exploitive in some way in order to catch and secure your interest in something – that's literally the purpose of marketing and advertisement. "Weaponizing" is implying that something is being exploited specifically for malicious / nefarious / damaging intent, and I definitely don't think that that fits the bill here. It's no "woman in the red dress" from
The Matrix for example.
If you're going to make a half-hour video on effective marketing techniques, I think it would be far more interesting to have someone who does that professionally break down the different layers of what they're doing and how they do it effectively (sort of like Corridor Crew does with VFX), rather than attempting to spin up an edgy narrative around it by explaining the bullet points and hitting 1-2 in-depth parts about a couple musical tracks.
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