Hard to tell, Juli. This movie is turning out to be a monster at the box office (already $650 mil), the word of mouth is phenomenal, and it looks like it might be the 5th movie ever to make more than $1 billion worldwide (the 1st one being Titanic). Plus, it will most certainly be nominated for Best Picture at the Academy Awards... and who knows at this point, could even win. So the US posters have been going up in price, now selling around $50, and there doesn't seem to be many of them (if you take out Moviegoods' crap - God I hate 'em!) So you have 2 choices: 1) fork out the money now, or 2) wait for the heat to subside a little, which may or may not happen. But then you're taking the risk to miss the posters entirely (if they are all called for) or face an avalanche of reprints (which I'm sure will soon hit the market.)
This is why I always try to get my posters before the movie comes out. I get them for cheap. If the movie turns out to be awful, my loss. But if it's good and people start collecting it, then I know I got the real deal.
T.