Oops - I see your topic from three minutes ago (which wasn't here when I started to pen my post)
From the pre-order page at EB Games:
"Pokemon EX Sandstorm arrives with 108 cards packed with even more EXciting new features. EX Sandstorm unleashes brand new evolved forms of Pokemon, such as Wailord-ex, Typhlosion-ex, and Raichu-ex. On top of this, players will now have the ability to use new Trainer cards, Multi-energy cards, and new powers like "Link Attack". Adding over 50 new Pokemon, more Poke-attacks, and more Poke-powers, Pokemon-e EX Sandstorm is a must have for all trainers!"
This would make it more than ADV2 + Mysterious Fossil ...