I don't think it is necessary for them to read the comics personally but it is a good sign when they do. Margot Robbie said she never intended to read al the Harley Quinn comics she was given but she did anyway because they were so good. I have hopes for her solo HQ film because she was talking about how rubbish the Joker and Harley's relationship is, so hopefully she will drop him and hopefully kill him in her solo film #tangent.
Nice, glad you're enjoying Ms Marvel. I really like Thor/Mighty Thor too. You can get more of both in All New All Different Avengers too.:p