I recently re-watched Richard Donner's Superman movie and one thing that stood out to me was how forward-thinking it was, for the time of it's release, in its depiction of masculinity. Reeve's Superman is not only very tangible, multi-layered and humanistic as a character, but also very emotionally intelligent, empathetic and in touch with his feelings. And yet, despite that, he's definitely not a pushover. When he's angry, he's very scary (I remember watching his reaction to Lois's death as a kid and being absolutely freaking terrified ).
Basically, I feel it's a vital aspect of Superman that has been forgotten and that I hope James Gunn recaptures. I definitely trust him to do so, given how intelligently he approached the subject in his Guardians movies.