I don't think they ll show that aspect of those two characters in the movie.
After all we know that Bichir's character is security chief, I think we should
value people as well as characters by their capabilities, skills, personality, reasoning and charisma,
not by their sexual orientation.
Let me put it this way, Alien is a SF movie, we know they are colonist... what would happen
if the top scientist for human reproduction etc. is homosexual... you wouldnt bring such person
to top priority colonisation mission?
I m not supporter of pro homosexuality but neither against the course of nature...