Looking at that list, 2006 has been really poor. POTC2 was dire, likewise Da Vince Code. Superman was a bad let down, so it's one in the eye for Singer that XMen 3 was the more enjoyable superhero flick and did better business.
Borat and Casino Royale were deserved successes, but easily the best film this year was United 93. Tough viewing, but essential.
Just hoping 2007 offers a better crop than this year's sorry lot, but will be real depressed if POTC3 or Shrek 3 clean up. YUK!