That is the key reason why I think this set won't come close to the GSF set in terms of selling per pin: the hype (and cause, let's be honest, they're not as nice). The Frozen GSF set has the same story as the WiR and Tangled DSF set; they did well, but blossomed after the DVD came out. Why did they do SO well after the DVD came out? Simple, all the pins were already in collectors hands so there were only 100 or so on the market and people had to fight for them after they realized what they were missing out on (the dolls also shot up).
Look at every LE WiR pin that has come out ever since the DSF set, not one has ever done as well as any pin in the original set (or the DS.com pins) which all came out before WiR became popular. The reason being, after it became popular, it was too late to get them back and those who had them weren't letting them go. Heck, every LE Tangled pin has never done as well as those that came out before Tangled got popular (marquee, R/C, Designer, Compcat all came out before Tangled was big and no Tangled pin ever hit as high as those 4 did).
That combined with what always kills pin values: hype. Hype has hurt nearly every big GSF release since Frozen and every big PTD after it comes out. They always start higher than they end up. Look at all the big recent PTDs and the Mali pins, every pin sold for really high when it first came on the market and now sells for less. Now that a lot of people are greedier, they are charging more than they can get and everyone is rushing to get rid of their stuff ASAP in fear of not making as much as the next guy. It's great for buyers, but terrible when a pin first comes out.
I'm not saying that it's guaranteed that these won't do as well, but with history, the greedy sellers, and the big killer "hype" (which this set already has had so much of, people are offering $700 on Fb without even seeing the pins in real life, they just want them to have them at all costs, that mindset is the definition of hype) are making this set look like every single set that has ever come out after a movie became the "big" thing, it will be big, but it won't be AS big as what people are hoping for (which I bet people are gonna expect about $300-400 a pin...not gonna happen).