It might not have great legs. X Men III comes out next week, and it should do well. And the week after The Break Up comes out, and you can't bet against Vince Vaughn. He draws really well among people who have nothing better to do than go to the movies...Like me.
This makes me ill.
I don't think either X3 or Break Up will seriously impact DVC. You're really talking about movies with 3 different target audiences, a suspense thriller vs comicbook action vs romantic comedy. As far as target audience is concerned DVC is basically running uncontested until deep into the normal falloff cycle of movie revenues.