Let's take a look at the top Magic Origins cards pre-ordering on Amazon as of July 13, 2015:
First, some honorable mentions:
Gilt-Leaf Winnower (#83 in Single Cards) - The Winnower isn't bad purely because it takes at least two creatures to block it. Then it has a strange conditional removal ability attached to it. Good news is it can hit a lot of oft-played creatures due to uneven power and toughness among many top creatures. It will probably see some play at least, and casual and Commander Elf players will find a home for it if they play Black.
Woodland Bellower (#85 in Single Cards) - A six-drop that grabs any creature with a converted mana cost of 3 or less from your deck along with it into play. And it has a 6/5 body. Will it see competitive play? Someone will play it.
Gnarlroot Trapper (#99 in Single Cards) - A one-drop Black Elf that can ping you to make Green mana or tap to give an attacking elf deathtouch. Solid creature.
Pia and Kiran Nalaar (#93 in Single Cards) - Chandra's parents have a lot of casual appeal, make a couple of Thopters, but their ability to sacrifice an artifact and Shock a creature or player for 2R isn't so exciting.
Now the top 10...
Tired of your opponent gaining tons of life? Sideboard this baby in. There's some crazy combos that could be used in a janky deck, using cards like Rest for the Weary and Wall of Shards, with Beacon of Immortality as a finisher. This could become a huge casual winner as well as a competitive sideboard card against decks that try to gain a bunch of life.
Previously, a mythic rare in a past core set, Gaea's Revenge has been reprinted at rare. It was never an expensive card to begin with, but it did see some Constructed play at one point. Yeah it costs seven mana, but ramp decks loved dropping an 8/5 with haste that couldn't be countered or targeted by any non-green spell or abilities from non-green sources.
Unfortunately, this big beastie (Elemental, actually) has no trample and gets chump blocked all day. That being said, when this was played against the control decks of the time, it often could get in for some damage no problem. Nowadays, it's hard to say how good it could be. At least it can trade with or beat a lot of the bigger creatures in the format. But a 7 drop outside of Green Devotion nowadays is a tall task. A lot of the demand is probably from casual and Commander players who are taking advantage of the card's lessened rarity, and that's perfectly fine.
Languish looks as if it's going to be a functional reprint of Mutilate, but in the right deck, it's going to be even better. With plenty of playable creatures having 5 or more toughness in today's Standard format, Languish is going to be very one-sided for a lot of decks, Siege Rhino, Tasigur, the Golden Fang, Dragonlord Ojutai, Dragonlord Silumgar, Silumgar, the Drifting Death, and Sidisi, Undead Vizier all live after Languish is cast. Wizards just keeps making Black and Esper Control too good.
Artifact decks continue to get stronger and stronger with Wizards printing powerful cards like Ensoul Artifact to make artifacts a more popular and competitive archetype. Getting a free 1/1 flying token every turn is cool and drawing cards is fun. 4 mana may be a bit much for this card to do a lot in competitive Constructed, but there are plenty of Commander decks that can find a home for it. It's a bit narrow, but people play Coastal Piracy and Bident of Thassa in that format, so the Spy Network would seem to fit just fine in an artifact-heavy deck.
Liliana was the first flip-walker ever revealed, and the more people look at her, the more people like her. But as good as her creature side is, and as awesome as the ultimate ability of her flip-side is, you have to really build your deck around her. Still, from a casual perspective, she would seem to be the most appealing, but there are three other flip-walkers ahead of her in sales, at least on Amazon. This version of Liliana is going to be a ton of fun in Commander and plenty of casual players will stuff her into their Reanimator decks.
Dwynen is a really solid Elf Lord. He's not to the level of the greatly popular Ezuri, Renegade Leader. But she does a lot for 2GG. She's a 3/4 with Reach and gives all your other Elf creatures +1/+1. Also, whenever she attacks, you gain 1 life for each attacking Elf you control, including herself. Lifegain has been becoming quite a big deal in Constructed, so competitive Elves should be able to find room for a copy or two of her. Plus, Elves are a really cool and popular tribe for casual players. She can serve as a decent Commander, too, although Ezuri is overall a better choice.
Hydras have long been a fairly popular tribe due to the power level that they tend to offer. Managorger is a good one. He's essentially a functionally better Taurean Mauler, swapping Changeling (acting as all creature types) for Trample. Whereas Taurean Mauler from Morningtide could be chump-blocked all day, this Hydra can't be. The big difference, though, is that the Mauler only got bigger each time an opponent played a spell. This one counts your own, as well.
As a 1/1 for 2G, it may not look like much. But in Commander decks such as Vorel of the Hull Clade that can abuse +1/+1 counters like crazy, this is going to be a major beater. Competitively, there are enough cards that make +1/+1 counters that the Hydra could find a way into some sort of Red/Green, Green/White or Abzan Aggro deck. Taurean Mauler has had a way of getting scary in the past, and has long been a casual favorite. This is actually a lot better. Mauler was a 2/2, and this is a 1/1, but this is going to get bigger a lot faster for sure.
Nissa doesn't get you much more than a Forest early on in the game, but once you play that seventh land, she's probably the best planeswalker in the set. It's interesting that she's only the 3rd most pre-ordered planeswalker from the set on Amazon, though. She is at the worst solid card draw, can protect herself with a legendary token, and create an army of 6/6 lands. Can't go wrong with Nissa.
Jace Beleren is perhaps the most popular of all the planeswalkers, and deservedly so considering the success of the original Jace Beleren, Jace, the Mind Sculptor, Jace, Architect of Thought, and to a lesser degree Jace, Memory Adept. Jace, the Living Guildpact hasn't done too much, and most competitive players don't seem to think that Jace, Telepath Unbound will be too exciting, either.
Vryn's Prodigy is definitely not exciting as a creature, essentially being a glorified Merfolk Looter. His flip-side also isn't super exciting, although his -3 can be useful to flashback an important spell. His ultimate is fun for mill players, but only in the most casual of settings. Considering how popular mill is for the casual Magic crowd, however, it probably isn't surprising that having the latest Jace is a must to at least try out. It's not like $10 for a Jace planeswalker is that unreasonable, although he may drop to $5 not long after release.. In any case, he is a 2-drop planeswalker, and yet another Jace.
The latest incarnation of Chandra isn't the easiest flip-walker to transform, but if you can, she's a decent planeswalker. It's not hard to see her casual appeal, and while she's considered perhaps the fourth-best of the five Magic Origins planeswalkers, she is a popular target at about $10. She's the top pre-ordered card from Magic Origins right now.
While Amazon is hardly the only, or most popular, place to get Magic the Gathering cards, it's still interesting to see what people outside the competitive Magic mainstream are looking at. In the future, we'll take a look at what other Magic cards sell on Amazon. You won't believe some of the ones we'll be talking about.