From newmoonthemovie.org:
According to Ted Casablanca at E!, Breaking Dawn will stay true to its roots instead of being watered down for the big screen.
Breaking Dawn features scenes that are quite violent and overtly sexual, and it was feared that the script would gloss over important elements that may not be appropriate for a younger audience.
Ted cites producers that say it will be “very, very sexual, …almost too hot for Twilight’s fanbase”.
Skip ahead to 2:35 in the video to catch the part about Breaking Dawn.
Who knows if this is true, but I have my fingers crossed!