If you're getting Bloodborne no matter what reviews may be saying, then have it pre-loaded on your PS4 you may be interested to learn there will be one potential thing preventing you from playing when it activates as there is a rather hefty day one patch (bugs fixes as well as adding online play and the Chalice Dungeons) weighing in at 2.69 gigabytes.
But there is some good news as the patch is available for download right now so you can update your pre-loaded game ahead of time.