I never understood why people thought something like a Thrawn Trilogy adaptation was a possibility for the ST. The mere fact that the story would be spoiled already was reason enough for it to stay off the table as an option.
The possibility of a live-action Thrawn Trilogy adaptation went out the window after the '90s, anyway.
By 1997, Carrie Fisher was already visibly aging, but she was still young enough to play a pregnant woman and do all the action that the story would’ve required of her. By 2014, though? No. It would’ve been impossible. They would’ve had to cast a younger actress to play Leia, and who would’ve wanted that?