I think there's a difference between quoting something in a review or as part of a presentation about film theory (or whatever), and quoting it in the context of a remix, where you're essentially engaging in fan-fiction first and commentary as a distant second (because the commentary is implicit and arguably subordinate to the entertainment function).

Now I am in favor of fairly wide latitude for this sort of reuse, which is a big reason I favor much, much shorter copyright terms, and graduated copyright at that (eg exclusive for 20 years, mandatory cheap licensing for the next 30, PD after that - for example). But it's hard to ignore the rightsholder's concern that this work is less about commentary than simply hitching a ride on a currently-popular franchise. It's not cashing in, since the person isn't trying to monetize it directly, but the person is trying to build their creative reputation from rearrangement of others' work, while denying any and all revenue to the original creator.

As someone who has spent the last decade making films from scratch rather than remixing others' work, I think this is pretty weak sauce, just as I think that DJing falls far short of musicianship. I engage in both activities, but when I'm DJing I don't consider that to be creatively equivalent to composing something original. People who say all creativity is fungible are lying to themselves.