I think the purple smoke scene in the promo was actually reused footage from 1×22 when Rumple brought magic to SB.
Just went to check screencaps to see if there was a comparable shot in 122.
Screencap from the 311 promo…
Looks to me like the 311 shot is a fresh shot for this ep. The cloud looks higher. The 122 cloud seemed to pass under the power lines.
So what I’m wondering is if the smoke starts out green when Pan enacts the Curse, but then Regina does the purple lightening, which alters the magic in the smoke, changes its colour to purple by the time it reaches town, and it does something different to what Pan had been planning.
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