While I'm not complaining about the movie coming out earlier (cause you know, we get to see it sooner), but wouldn't the 50 Shades sequel provide more competition since it has a built-in "fanbase" and the first one made over 500k worldwide?
The first one also beat out Kingsman during the opening week of it's release:
FSOG: $85,171,450
KINGSMAN: $36,206,331
Granted Predator has a larger fanbase than Kingsman, I still think it's a riskier move then releasing it against a shark movie. Also have to remember that Shane Black has stated that the film will be an "event film" and will have a larger budget, which obviously makes it's even more riskier.