I'm sick of people portraying this as some massive box office bomb. It's number 1, and took in 84M+ over the weekend which is actually where Paramount had originally projected it before they moved the IMAX opening to Wednesday. The problem is the IMAX opening I think was moved too late and that probably affected the numbers.
Yes, the domestic numbers are lower than what I think the studio had hoped for but the international markets are making big gains compared to previous Trek movies. Studios are turning more and more to international markets as domestic box office hasn't been as strong as in the past.
The movie had some cons (no pun intended) going for it. The first movie in 09 was set up to reboot and refresh the franchise, problem is they waited 4 years for the second installment. When you're tying to build up a franchise, 4 years is too long. The second movie should have been out in 2011 or 2012 at the latest. Also, Star Trek is not a mainstream thing as much as Paramount is trying to turn it into one. It's still a bit of a niche market. Finally, why all the secrecy surrounding the villian? Now that the truth is out and we've learned who Harrison really is I've found people around me going cool I'll have to see it now. They should have promoted the heck out of that IMO! The word of mouth seems to be good for the movie and I think that'll keep it standing.
That being said it's a forgone conclusion there will be a third movie. I think it'll be out by 2016 to mark the 50th anniversary. Whether JJ Abrams is involved or they trim the budget a little, we'll see.