This movie was pretty bad. I almost walked out except that I couldn't ditch my party. Way too many references to the first movie, not enough plot, and the story was too unrealistic.
At least the first one had some believability to it; this one was straight out of of a Mission Impossible or Independence Day script. For 5 years in the making, I definitely expected a lot more.
If you need to see this, wait until it comes out on cable.