I am bit disappointed George Takei's reaction, and that he insists that Sulu will be 'outed' in this movie. So far, there is no indication of that. For all we know, the crew has been aware of Sulu's marriage all the time. And that it never came up is basicly normal the 23rd century. Sure, we have never heard of it before, but sofar, we've seen the crew during missions. A simple hinting towards his husband would have felt akward. The only relationship that was talked about was between Spock and Uhura, and that was only since it could have been a situation that could intervere in a mission. It wasn't as if anyone elses relationship needed to be hinted at. How would you, during a crisis? Ship exploding all around you, and suddenly Scotty turns to Sulu, asking, how does your husband feel about you taking such risks? That just feels weird during a highstake situation.
No, for me, personally, a small scene on Yorktown, where Sulu is talking with his family, and sees Kirk walking. He calls Kirk over, and says something like 'Captain, I'd like you to meet my husband' and Kirk replying 'It's so good to finally meet you, we've all heard so much about you'.
That would be it. Perfect. Nothing more. Establishes that everyone knew Sulu was married. I would be perfectly happy with that.