The 1.02 update for Fat Princess Adventures will include two pieces of free DLC, the Short Cakes’ Tavern and an arena mode. The former is a social space where you can meet up with your cake loving chums, whilst the latter is a horde mode.
Arena Mode unlocks once you have defeated Zug in campaign play; you can then compete in the Castle Arena against endless hordes of enemies. Play through the campaign and reach the Swamp, and then you can compete against your friends in the Temple Arena. These two new arenas pair players together against an onslaught of enemies that will put your survival skills to the test.
There will also be paid DLC, the Super Awesome Hero Loot pack, which includes new weapons and armor including the Stun Baton, Impact Mathemagicks staff, plus cosmetic items.
Source: EU PS Blog