According to Batman: Arkham Trilogy FAQ Page, Arkham Asylum is only included on cartridge. Batman: Arkham City and Batman: Arkham Knight will require an online connection to download and install : r/NintendoSwitch
Batman: Arkham City Armored Edition for Wii U
Batman: Arkham City – Armoured Edition (Wii U) - The Cover Project
Batman: Arkham City Armoured Edition | Wii U games | Games | Nintendo
Batman: Arkham City Armored Edition 1080P, 2K, 4K, 5K HD wallpapers free download | Wallpaper Flare
Nintendo Download: 10th April (Europe) | Nintendo Life
Batman Arkham City: Armored Edition - Wii U Review
Batman: Arkham City (Game) - Giant Bomb
Batman: Arkham City - GameSpot
CEMU 1.26.2f | Batman Arkham City Armored Edition | Wii U Emulator HD PC Gameplay - YouTube