So I just finished the game and it was awesome but there are a few plot holes that are buggin me. I don't know if I'm missing something or what but....

#1
 
The Joker dies from his illness, but I thought Harley stole the cure when you were fighting Mr Freeze. Why didn't she just give it to Joker after she stole it? Why did Clayface have it?


#2
 
why was Harley tied up in the Steel Mill at that one point in the game? and who did it?


#3
 
What happened to Two Face. I mean I know you fight him in the Catwoman add on, but that's it?


any other comments/thoughts on the game? I already can't wait for the next one.