The upcoming XY--Ancient Origins is very strange set:
for the spoiler,dude the deck has:
*less amount of rare holos,like it was 7 rare holos on the set
**4 of the evolve pokemon are common
***besides of the 100-card set (including secret rares),it was a "EPIC" set.
*This spoiler was come from the videos that I saw on YouTube. The TCG Player bought the boosters on the online seller on EBay.
The videos that I saw was not a prerelease.