He used steroids. Not hard to believe. But them hiding the fact doesn't help the perception of gear in any sense. You could see pics of the production pictures for batman as well. His back was huge, and covered in acne.
Eat Big, Lift big, Gear = Huge gains...
Yeah, it'll be a fine day when people wake up and realize that, when someone NEEDS to be in the ideal physical form for a film role, steroids are usually what get them there in a hurry. When even Stallone is now open to saying that he's relied on them to get ready for a role, it should be figured that this isn't the exception, rather, it's the norm.
It isn't as if Hollywood is going to say "Well, if it takes him 10 months to put on 20 lbs. naturally, that's fine, we'll just postpone everything until then!" When you have hundreds of people waiting for a set date to begin a major project, they will do ANYTHING to ensure that whoever needs to look the part, looks the part the way they'd like by day one. If that means pumping their lead role with 500mg of testosterone once or twice per week to ensure that he looks the part without wasted time, then that's what's going to happen.
It's business, and business will do whatever it needs to for ensuring that things run on time and without a hitch.