Firstly, the Sneak Preview has the chance of getting your hands on this Supreme King Z-ARC mat:

As well, we can confirm the Type identities of the following 20 Imports and TCG World Premieres

MACR-EN081 = Xyz Monster
MACR-EN082 = Effect Monster
MACR-EN083 = Effect Monster
MACR-EN084 = Effect Monster
MACR-EN085 = Trap Card
MACR-EN086 = Effect Monster
MACR-EN087 = Effect Monster
MACR-EN088 = Spell Card
MACR-EN089 = Trap Card
MACR-EN090 = Spell Card
MACR-EN091 = Effect Monster
MACR-EN092 = Normal Pendulum Monster
MACR-EN093 = Xyz Monster
MACR-EN094 = Effect Monster
MACR-EN095 = Normal Pendulum Monster
MACR-EN096 = Normal Pendulum Monster
MACR-EN097 = Ritual Monster
MACR-EN098 = Spell Card
MACR-EN099 = Trap Card

Source