I think we'll see more of a drop once Terminator Salvation and Night at the Museum 2 opens. Both take up the action and family oriented crowds that have ventured towards Star Trek so far.
Maybe, but the former is exceedingly dark, the latter is exceedingly fluff, so there still will be that niche to fill over that long weekend (I hope).
Be interesting to see how this weekend plays out. My son's at the theater with friends again. Maybe they will contribute to the box. I know I will tomorrow at IMAX...
