The most interesting part of “ The Mother,” a decent if forgettable action pic starring Jennifer Lopez, is the one that is left largely unexplored. The movie is a high-concept thriller that boils down to just a few words: She’s a mother and an assassin. OK, you’re probably thinking, fine.
Misha Green’s script was a hot commodity in 2017, around the time “Wonder Woman” opened, which had left some studios scrambling for action movies fronted