“Halloween” should keep powering the domestic market as Universal’s R-rated slasher film eyes a massive opening in the $57 million to $65 million range. The studio is cautiously anticipating a $50 million bow, though some industry analysts think it could rocket past $70 million when it debuts in 3,928 theaters. “Halloween” is also releasing in 21 international territories this weekend. Even the lower part of that range would easily shatter records for the best launch in the “Halloween” franchise. The 2007 reboot holds that distinction now with $26 million. “Halloween” also looks to notch one of the best starts for...