I don't think that's the movie though. It's not really a king biopic as much as its a movie about Selma and Bloody Sunday so while it would've been cool to see that, that's a different movie. Everything that happens in that movie had to do with Selma and the methods taken to get legislation passed so Malcolm's importance was the one scene he did
Your right I just feel like they should've at least MENTIONED that King and Malcolm had met that one time. It would've made him mentioning his death in that scene more impactful than it was