Third Set in Innistrad Block called "Avacyn Restored"

Wizards of the Coast announced that the third set in the Innistrad block code named "Roll" is "Avacyn Restored". Although it's the third set of the Innistrad block, it will be a large set. This means thatInnistrad Block Constructed will be composed of all three sets, but Avacyn Restored will be drafted by itself. Sealed events will use six Avacyn Restored booster packs. Find the official announcement and cool art showing the angel Avacyn herself (?) here.