The fanverse has finally calmed down in the wake of Ben Affleck being cast as Batman in Zack Snyder's sequel to Man of Steel - which we're referring to as Batman Vs. Superman. We were finally moving on and entering a discussion about what kind of Batman Affleck would be playing (a Warner Bros. executive said he'll be “tired and weary and seasoned”). Affleck has not yet commented on his involvement, but no one really expected him to do so, as even a diplomatic, carefully-worded statement would likely be the equivalent of throwing gasoline on a bonfire.
Which, it seems, is exactly what teen pop star Justin Bieber has done. Bieber recently Instagrammed a photo of himself holding a screenplay up to a mirror. The title of the script is Batman Vs. Superman, credited to David S. Goyer and Zack Snyder and supposedly based on Batman: The Dark Knight Falls by Frank Miller & Klaus Janson (that's the last issue of The Dark Knight Returns). Bieber's un-subtle caption reads: "#robin??"
The script has a big "Bieber" watermark stamped across the title page. It's even bound by just two brads, one in the top and one on the bottom, which the middle one left open (it's quicker and easier to copy scripts this way, ask anyone who's ever been a development reader).
It's also a fake.
How do we know for sure?