How many times have this happened? Magazine talks about a reveal, GAF assumes it's Demon's Shenmue 3 and then gets mad at the magazine. How many times?
It's not so much that it isn't Shenmue or Demon's Souls, it's that the game they have on the cover, which they teased as 'the most exciting cover in our history' with 'a series of massive significance
finally being confirmed for PS4' that they 'can't talk about' untill their cover (implying that this cover is the first time we'll be seeing the game), turned out to be a game that has already been officially revealed by another magazine (Gameinformer).
This 12-page article is likely just going to be a retread of the 14-page Gameinformer article. I fail to see how this is in any way exciting, even for the writer of the article itself.
Had they actually been the first to reveal Arkham Knight, then it would have been a different story.