IOW, even if there are people who would get put out about this hypothetical bait-and-switch situation, that hardly spells doom for the movie. As long as Mysterio doesn't disappoint, everything will be fine. ETA: Especially since none of the materials released so far come even remotely close to promising people that the elementals will be in any way super-duper-amazing. In fact, they've barely even been mentioned in the trailers at all so far - as opposed to the IM3 trailers which focused very heavily on Kingsley's magnetic, off-the-wall performance.