We don't know how many of the Amazon preorders were grabbed by resellers, but people are already trying to flip their copies, which they won't actually have for another four months, on eBay for hundreds of dollars above their retail price
If you find that you still have too many cards to sift through, I suggest sorting into categories like targeted removal, mass removal, ramp, and card draw
Ethan Fleischers design team hit on the great idea of reusing the Unearth mechanic on a lot of Necron creatures, letting them rise from their tomb world (uh, graveyard) to ambush your opponents
There will often be cards from that set included in the Masterpiece Series (like how the Battle for Zendikar rare dual lands were included in Zendikar Expeditions ), but they will typically exist in the set in a traditional frame in their normal rarity in addition to appearing in the Masterpiece Series
Duskmourn: House of Horror has potential, but we'll have to wait and see