Arkham Asylum

2 parts come in a colour no other set has for that mould

• Hips and Sand Green LegsGreen
• Roof / Tower 6 x 8 x 9Light Bluish Gray

9 parts appear in only a few other sets

• Panel 4 x 6 x 6 Sloped with Stone Wall PrintDark Bluish Gray · ×3also in 8802 Dark Fortress Landing, 8877 Vladek's Dark Fortress
• Panel 3 x 8 x 6 with Arched WindowBlack · ×2also in 8876 Scorpion Prison Cave, 8877 Vladek's Dark Fortress
• Bar 1 x 4 x 3 Window [Side Tabs]Dark Bluish Grayalso in 7021 Viking Double Catapult vs. the Armored Ofnir Dragon, 6210 Jabba's Sail Barge
• Door 1 x 4 x 5 with 4 Panes, Squared BaseReddish Brownalso in 4756 Shrieking Shack, 5378 Hogwarts Castle
• Hair LongDark Redalso in 4762 Rescue from the Merpeople, 852001 Castle Chess Set
• Tile 1 x 1 with Padlock PrintTan · ×2also in 4753 Sirius Black's Escape, 4766 Graveyard Duel, 3825 Krusty Krab
• Animal, Rodent, Rat / Mouse [Plain]Reddish Brownalso in 4754 Hagrid's Hut, 4753 Sirius Black's Escape, 4853 Spider-Man's Street Chase, 7783 The Batcave: The Penguin and Mr. Freeze's Invasion
• Fairing, Motorcycle, ModernBlackalso in 8967 Gold Tooth's Getaway, 79118 Karai Bike Escape, 7993 Service Station, 8896 Snake Canyon
• Hair Angular Swept SidewaysBlackalso in 3573 Superstar Figure, 7705 Gate Assault, 7706 Mobile Defense Tank, 8107 Fight for the Golden Tower

2 parts are otherwise only found in Super Heroes DC sets

• Equipment Batman Accessory - BatwingBlack · ×2
• Equipment Handcuffs Long [Batman]Black

8 moulds first came out in 2006, including in this set

• Weapon Batarang×3
• Weapon Gun Semiautomatic Pistol×3
• Creature Body Part, Dragon Wing 8 x 10 [Plain]×2
• Equipment Handcuffs Long [Batman]
• Hair Angular Swept Sideways
• and 3 more

6 existing moulds first came out in their colour in 2006, including in this set

• Brick Wedged, Curved Triple 4 x 6 x 2/3 with 4 StudsDark Bluish Gray · ×3
• Brick Sloped 30° 1 x 1 x 2/3 (Cheese Slope)Black · ×2
• Bar 1 x 4 x 3 Window [Side Tabs]Dark Bluish Gray
• Brick Wedged, Curved 2 x 3 x 2/3 Two Studs, Wing EndBlack
• Fairing, Motorcycle, ModernBlack
• and 1 more

4 minifigure parts with their print are only in this set

• Minifig Head Nightwing, Black Eyemask, Smile Print [Blocked Open Stud]Light Nougat
• Minifig Head Poison Ivy, Red Eyebrows, Green Lips Print [Blocked Open Stud]Light Nougat
• Torso Bodysuit, Blue V Logo and Muscles Print (Nightwing), Blue Arms, Black…Black
• Torso, Dress Made of Leaves Print (Poison Ivy), Light Nougat Arms and HandsLight Nougat