Sterling K. Brown’s role is a government agent who is an antagonist before needing the help of the heroes, and while their direct connection to the aforementioned characters is unclear, we know that Olivia Munn will be playing a scientist while Keegan Michael-Key is another soldier who gets pulled into the hunt.
As far as relationships go, we now know that Trevante Rhodes’ Nebraska Williams is his best friend, but it’s also been reported that Jacob Tremblay is playing his autistic 10-year-old son.
From what we’ve learned during the development of The Predator, McKenna will be the lead in the film, and kick start the narrative by discovering evidence that the titular alien is on Earth (a claim that nobody believes).