This is something that really excited me and I know that I had to share it with and zerostates (For some reason I can't make the icon come up. xP ) and I think they will be pleased. I went onto Arkham Knight's website and found a necklace that had on it a small insignia that means so much. What could it be to make me make this journal? A circus tent with the letters 'F.G.' on it. The Flying Graysons. Is this a sign that we may be able to play as Nightwing? We already have DLC for the Red Hood (which I am really excited about), so maybe we will get to play as Nightwing as well. If you want to see the necklace, here is the website.
The site is a little glitchy so try and be patient with it.