It's an ok trailer, I guess. But the image of the Ghost Rider is so good that I reckon they should have had a shorter trailer with more Rider and less Cage. It looks sort of generic and neeRAB scenes that show that this film will stand out.
And as for Cage's hair...
thats because the trailer is unfinished. they haven't added the special effects. Someone record it with a camecorder at one of those comic conventions. The finished trailer is said to be with the x-men movie.