[quote=@GreenGrenade]
[hider=Possible Spoilers]
I'm busy protecting Ivy's plants after the Cloudburst, well, burst. I'm desperate to find out who the Arkham Knight is, though. Don't tell me. [i]No-one tell me[/i].
[/hider]
[/quote]

I can't believe you haven't figured it out yet! The game doesn't exactly hide it.