Jokes and Riddles - Batman Arkham E4

FonyX is back on Arkham island to stop the insidious plan of the Joker. This episode we get an idea of what it actually is. But its the Joker so we would be trying to stop him regardless. (Except in Batman: White Knight where the point was he was trying to actually help and Batman just couldn't believe it) First we have to go to our Batcave for some exposition, and then it's time to explore the island proper, but Joker's takeover is progressing further and further...