2009 Star Trek found favour in US audiences ($258m) far more than abroad ($128m).
Paramount are canny enough to not let as well known a name as Star Trek to slip by in this age of franchise cinema - they know a certain audience will lap up big screen Trek in any iteration. But they'll want a significant improvement on the international figure for ST to be a true major player, because that's how it rolls these days.
I wouldn't be surprised to see Star Trek Into Darkness do more business internationally than domestically, which would be the opposite of Trek 2009. Sequels, particularly 3D sequels, tend to do better outside the US if big budget films from the last few years are anything to go by. That probably played a big part in Paramount pushing for the 3D conversion.