Considering we should've had the premiere date two months ago I've been a bit confused, so did a bit of digging to find out what's been going on behind the scenes, and thought I'd share what I found for those who don't know
Basically, CBS (and notably Les Moonves) are embroiled in a legal battle that may well end in his resignation. The speculation is that if he leaves then Julie will too out of loyalty, throwing Big Brother into chaos. Basically, they seemingly have much bigger things to focus on than BB20...
Here's some good articles that provide an overview of the legal battle:
http://www.latimes.com/business/holl...518-story.html
https://www.recode.net/2018/5/17/173...source=twitter