Which, you know, as much as I love and prefer the litverse, is completely understandable. They couldn't make a big-budget video game title designed to appeal to the masses (and specifically released to come shortly after the release of the Abrams film), and not only have it not include one of the franchise's most popular villains, but have it be something that happened a while back in some books that most of their players will never read.
Its unfortunate, but that's marketing for ya. I greatly enjoy STO, but not for the plot. Its a sandbox that I use to fly around and blow stuff up.