Steroids work wonders for new Bond, Wolverine, the entire cast of 300, Batman in Batman Begins (though he has looked like the machinist in the last one and this upcoming film), Cap America, ect ect ect. More realistically 45 days of special hollywood vitamins, heavy weights and a strict protein diet will typically yield about 20-30 lbs of solid muscle and significant loss of bodyfat. In hollywood "personal trainer to the stars" typically means the one who can hook said star up with the appropriate special vitamins
in only 1 month's time? Shooting starts next month, and Del Toro just passed on it, so, negotiations wouldn't even have begun for his replacement yet. 6 months, yea, no problem, 1 month, that's some very serious gym time^ Actors get sent to the gym to get in shape for movies all the time. Christian Bale was skeletal before Batman Begins; that's the extreme example, but Hugh Jackman, Daniel Craig, Toby Maguire, Nic Cage and many, many others have radically changed their body shape to fit various roles.
Dennis,
Highly placed source? Where is this source highly placed? Don't get me wrong, I happen to agree, it's very likely, and makes an awful lot of sense they would indeed use Khan, but, I wouldn't bet the baby on that being a confirmation.