Allusions to other Batman media

Below is a list of characters, locations, etc. who originally appear in the other Batman Media prior to the episode's airing, by appearance.

Characters

1. Renee Montoya ("Pilot")
2. Nora Fries ("Wrath of the Villains: Mr. Freeze")
3. Toy Maker ("A Dark Knight: Pieces of a Broken Mirror")
4. Cosmo Krank ("A Dark Knight: Pieces of a Broken Mirror")
5. Harley Quinn ("A Dark Knight: Mandatory Brunch Meeting")
6. Bird ("Pena Dura")
7. Jane Doe ("Nothing's Shocking")
8. Barbara Gordon ("I Am Bane")
9. Kane family ("Rise of the Villains: Scarification")

Locations

1. Arkham City
2. Krank Toys and Models
3. The Narrows
4. WEBG Channel 7
5. Diamond District
6. Falcone Shipping
7. Wayne International Plaza
8. The Bowery
9. Burnside
10. Gotham City Lighthouse
11. Gotham Water Filtration Plant

Organizations

1. Scarecrow's Army
2. Neon Gang

Items:

1. Shakespeare Bust
2. Scarecrow costume 
3.  Bane's life support suit 
4. The Gotham Star ("Legend of the Dark Knight: The Beginning...")
5. Batarang ("Legend of the Dark Knight: The Beginning...")
6.  Dark Knight suit ("Legend of the Dark Knight: The Beginning...")