Tenet‘s release a few weeks ago, viewers have already come up with fan theories about the movie.However, one of the big talking points surrounds Robert Pattinson’s handler character Neil, who, like many other aspects of the film, remains rather mysterious.The theory doing the rounds suggests that Neil is actually a grown-up version of Max, the son of Andrei Sator (Kenneth Branagh) and Kat (Elizabeth Debicki).One big hint is the fact that Neil reveals to the Protagonist (John David Washington)