I think it's a set worth buying early as there's going to be a lot of room for these to grow. They has a lot of things going for it. In regards to the original version:
-Recreation of an iconic JSC cover with current iconic characters
-A lot of key characters on the cover
-Original variant was only available at a Mexican Comic-Con at one per person (technically)
-Price went up on the raw over $200 in one month and quantity has severely dropped off.
-There's a total of one graded so far on CGC after a month on the market. Makes me believe stayed in Mexico where CGC probably isn't as popular.
-It's a "Mexican" edition that's in English. So there's probably not going to be an American edition of this cover especially now that the variants have been announced. Likewise, I doubt we'll see a spanish version.
So with that in mind, the variants weren't largely announced unless you were here or on Decomixado's facebook. They were released at something like midnight EST and were gone by the next afternoon. Obviously orders were cancelled and they've been available briefly twice since, but both were gone in hours. They've been sticklers with keeping it to one per person, so I expect a lot to be kept in personal collections. So not many will be on the market.
Looking on Ebay, there's been about 3 of each cover that's been put up for pre-sell since they were announced. Compare that to the hundreds of the RYV pre-orders. People are going to keep their copies.