The Joker first appeared in Batman #1 (April 25, 1940) and in DCUO he is voiced by the Legendary Mark Hamill.
1. Joker is a mentor for villains.
2. Heroes will fight Joker in the Regal Hotel leveling mission alongside Batman.
3. Heroes will fight Joker to save Batman and Robin in the Final Batman Mentor Mission.
4. Joker appears in Gotham Under Siege as part of a villain feat to find him 15 times.
5. Joker appears in The Last Laugh.
6. Joker has 2 Legends characters for PvE\PvP.
7. Joker appears as one of the three Man-Bat bosses in Riddled With Crime's Zoo raid.
8. Villains will fight alongside Joker to take down the Batman in Regal Hotel, till Harley Arrives.
9. Villains will fight Batman in the last Mentor Joker mission and then they will fight Robot Joker.
10. Joker's gang is going against Riddler's gang in Riddled with crime.
11. Heroes and Villains will go at level 15 to the Fun house to defeat Harley Quinn (Heroes) and Robin (Villains),
and defend or destroy Joker's toxin.
12. The Vault is actually Joker's funhouse, and you will hear him talking at the beginning and before you leave.
13. Joker Androids appears in the Funhouse area or in the vault when you pop presents.
14. In Character Creation players can select a pre-made Joker template.
15. Joker's suit got re-textured in last years spring update.
Inspired Items:
1. Christmas Holiday Tree and Wreath
2. Halloween Joker face Mask
3. Robot Joker Mask
4. Joker Hoodie
5. Clown Prince - Future Joker Anniversary event style. Also available as enhanced version in the Gotham Starter Pack.
6. Gotham Starter Pack gives villains a trinket to summon Joker (Heroes can summon Batman) for a short time.
7. Monitor Propulsion Pack (A back piece that drops in the vault and if you equip it you can use it the flight movement).
8. Joker Bouncy Ball
9. Various Base Items from Riddled with Crime
10. Joker's Punchline gear style
11. Joker's goons henchmen (Gotham Time Capsule)
12. Various Funhouse base items
13. Joker has 2 playable legends for Legends PvE\PvE.
14. Psycho Gear Style