But I think I found our onscreen link, and he's called Buck Bokai.
So there you go. Trek and DC OFFICIALLY connect, and from the DCU, you can get almost everywhere. DC characters have crossed over with Marvel characters, Batman has teamed up with Holmes and Judge Dredd, and so on and so on.
Obviously, these are QUESTIONABLE answers. Maybe I've missed an even better decoder ring leading out of Trekspace. You tell me.