It is easy to see that the home-made quality of the first movie got replaced by a heavy dose of 'studio movie' look and appeal for the second pic. The colors are sharper and bolder, the scenes are more vivid, and the characters most certainly look like they have better make-up, wardrobe and hair. Mostly the vampires, which was a huge short-coming of the first movie, imo. I guess the studio saw the bigger potential but also the amount they have to spend to make the box office numbers soar even more.
As much as I love creativity, I must admit I mostly hate the hand-held 'indie' look of certain movies. When I see a movie, I want to be dazzled by the composition, colors and the level of professional photography. That said, you could see how serious the studio was when they had decided to re-audition Jacob and could even replace the actor with someone more substantial. I am sad that the franchise, as a whole, will look lame now though... too all over the place style wise.
the trailer is good though. Kristen said that they had just finished shooting. I wouldn't be surprised if they have created this trailer just for tonight from the scenes they could manage to complete and stitch together. I bet they are working furiously now to complete all the CGI and scoring to be able to release it in just 4 or 5 months.