Remember the OCG Noble Knights Mat? Something like that, except even more exclusive.
Mind you, some details aren’t 100% confirmed.
Edit: More Updates
It features Dark Magician Girl and the five new Magician Girls from the movie, in full color.
It comes with two Kaiba Corp Rare Cards:
One is a copy of Dark Magician Girl based on her new artwork from the movie.
The other is this guy:
エルフの聖剣士 Elf no Sei Kenshi (Literally Elven Holy Swordsman, TCG would be “Celtic Sacred Guard” or so such)
Level 4 EARTH Warrior-Type Effect Monster
(This card is always treated as a “Celtic Guard” card.)
(1) If you have 1 or more cards in your hand, this card cannot attack
(2) Once per turn, during your Main Phase: You can Special Summon 1 “Celtic Guard” monster from your hand.
(3) When this card inflicts battle damage to your opponent due to it attacking: You can draw cards equal to the number of “Celtic Guard” monsters you control.
You can reserve this set until February 29th, 2016. However it won’t be delivered until approximately April 21st, 2016.
There will be a secondary reservation period until April 22nd, that won’t be delivered until June 30th, 2016.
Source: Weekly Shonen Jump