If only they had sunk to 2999 meters 2: episode 2
The movies are not real, it’s something some random person made up. You’ll see this sort of thing pop up on wikis occasionally. If you click the link for the page on the first movie in the trilogy, it’s both a “fan film” (which sort of exists: https://youtube.com/watch?v=CC9fYUDQ6CM ) and directed by James Cameron. It also says it features a 9 year old Scarlett Johansson playing an adult.
The book version is real though: https://starwars.fandom.com/wiki/Star_Wars:_The_Thrawn_Trilogy
Saved you a click: