Aldo! Shame on you! You're one of the finest in this community, and you claim that no one would recognize the universe? Who cares?! Do you have any idea what the possibilities are in the immersion of a game with an audience?
There are tons of people who have played sequels to games but had no idea what the first was like, and the sequels excelled further than the originals. Why? Storyline development and beginning player immersion.
Take a look at the amazingly popular series. Metroid, Zelda, EVEN Freespace 2, there's many who played that first, before the original.
The community for Total Annihilation was not always that big. At the time they began fighting for a sequel, they had to grow to fight it. That's something we can all do as well.
[V] doesn't have to make a sequel, they can make a prequel. They don't have to make it EXTENDING clearly off of everything. Take a look at Star Trek. Do you really think everyone who watched Voyager, DS9, TNG, and the original show really knew about ALL of it? They don't have to know what came before.
In fact, Freespace 2, I felt, veered away from the original almost too much. It is possible, believe me, to make an excellent sequel that everyone can look into. They can also remake the stories, port the campaigns, and tell the entire thing throughout records and documents. IMMERSION.
The more the player wants to find out, the more there will be for the player to discover and explore. It's only more of a building base.