After playing the 3 portions of gameplay that make up Batman Arkham Knight's Red Hood Story Pack, I can say that I am a fan. It doesn't last for long, and yeah, I would have liked more content, but what is available is pretty decent. Especially for a preorder bonus that's sold by itself for only $1.99.
The story pack involves the Red Hood, Batman's former sidekick Jason Todd, going after Roman Sionis, aka The Black Mask. (Jason used to be the 2nd Robin, before he was killed by The Joker and brought back to life years later.)
To start things off, you take down some thugs in a Freeflow Combat challenge. The character takedowns are great too, because Red Hood doesn't hold back. He actually shoots his enemies in the face.
Then you must take out a room full of henchmen, Silent Assassin style. It's tricky because you don't have the gadgets or moves that Batman has, but it works.
Finally, you get to the last room, which involves taking out a few guards in combat. Then Blask Mask shows up with some more guards, and you have the boos fight. He's actually really easy too. (Just dodge his bullets, and return fire.)
Once he is finished the story pack is over, and you are lefting wanting more. It's not bad for 2 bucks though. And of course, if you have the Season Pass, it's already included.