I seriously doubt that we will be hearing a tremendous amount from Sarah on the subject of Buffy except a possible, "...since I left Buffy, I've been..." She is trying (as well she might if she is in pursuit of a movie career with any kind of diversity.) to avoid that actors' albatross, type casting, and the best way to do that is to distance herself from anything that even vaguely hints of vampires or "one girl in all the world" type roles. That doesn't make her ungrateful to the millions of Buffy fans, just ambitious for her own career (she should be, too, because she's gonna have to support "No Talent Freddy" for as long as they stay together)