I have to say the trailer looked pretty good. Best trailer for an X-men movie I've seen... I'm not of fan of Brett Ratner but the action sequences look good if not better than the stuff in X1 or 2.
The number of characters also makes it feel more like an X-men movie too me. I have high hopes for Kitty Pride since when I was growing up, she represented what the X-men stood for and her relationship with Wolverine was one of the cornerstones of the series.