The Hollywood Reporter announced today that fans will be without new seasons of Big Brother and Love Island this Summer. Fortunately, it does have a full season of globe-trotting unscripted series The Amazing Race ready to go. Following the recent ViacomCBS re-merger, the network will have access to originals from Viacom brands, including Paramount Network, to fill the programming gap.

With so many productions shut down, I highly suspect the 22nd season Big Brother will be rescheduled for later in 2020, or maybe early 2021.
There’s a possibility of BB being aired in the fall instead of Survivor, since Survivor is dependent upon international travel to produce.
I don’t understand why they can’t come up with a solution. Have the cast isolate and get testing before entering the house.