Prequel books etc are not cannon and further more, that aspect is already really stupid. Why would the only public images of him be blurry when he is working hand in hand with authorities in AA which takes place b4 city. They had cameras everywhere in the asylum and he walks right upto Sharp and a ton of guards and escorts Joker to his cell, he works openly in that universe with Gordon walking around in public and right in front of other cops who don't attempt to arrest him. Seems like anyone who worked there and wanted could have easily taken a picture.
Well, we were all clammoring for more DLC to take place in AC and that's pretty much exactly what this is so having said that and considering it's a differant dev, I'm content it looks so similar. But I'd also agree that full price for something like this is silly. I hope it's no more than $30-40 even though that seems unlikely. They are recylcing the engine, half the environment, the combat system, I can't imagine they put half as much work as RS did into AC.