I'm going to say that it's not hard to make a product using everyone else's cards.
Not to be too much of a downer because I too think this is going to be a good product that will make many people happy, but I think it's opening the door to a whole new product idea that we might grow tired of real soon. Just think, now anyone with any kind of collection can offer it up in a packaged format. They can even go around buying up good cards to package. After all, is this really that different than all those auctions we used to see on ebay? You know, those that said something like, "I have 100 packages sealed up and ready to mail out. Included in them is a Lebron James Equisite RC Auto. Buy one, several, or all of them for your shot at this fantastic RC card!".
It will be interesting to see how this plays out. I'm just afraid it will be the beginning of endless recycling of legendary cards. I hope I'm wrong. After all, maybe that's not a bad idea.