Surely you mean “when will there be any heterosexual male mercs in DB?”
All of DB’s Mercs are very much themselves, irrespective of how they identify or get labelled. And you’re quite right, we don’t want to make Mercs a particular way just for the sake of being able to claim we had. But we also don’t want to exclude humans for no good reason either.
Who knows who DB’s Mercs go back to after a day’s work? Well, I do, but that’s not the point, the point is that it doesn’t define them. They’re just professionals, from all over the world, the best at what they do, and they don’t do their job in a way that depends on who they’re attracted to, so how could you tell, and why would it matter?
And just wait until you find out which of the Mercs used to be married to one another…