hmm, whz not original races?
Who do we as supporters need to beg to get it done?approved etc?
It's a question of separating the lore and the aliens. We don't want to retell Star Control 1/2 and we don't want to have to treat Star Control 3 as canon.
That isn't to say you won't ever see the aliens in DLC or something. But we don't want to be meddling with Paul and Fred's lore.
They have told us that they hope to return to their story someday and we want to keep that door open. While we would love to see a Star Control: Ur-Quan legacy, I would still be very happy with any sort of sequel to the Ur-Quan Masters.
By contrast, if we tried to continue it then you'd end up with a lot of confusion. Star Control 3 made it confusing enough.
As far as we're concerned, The Ur-Quan Masters is Paul and Fred's universe to continue as they see fit. And Star Control 3 is going to be renamed "The Kessari Quadrant" and be treated as an alternative universe whose events are not canon to The Ur-Quan Masters.