It's a complete non-starter without proper custom VO, especially for the party members and major NPCs like Uthar and Yuthura. But fortunately we are on the cusp of that being a realistic proposition (as in it actually sounding good/natural).
As to the mechanics of the rest of it, the way I'd tackle it would be to create a branching point with a cutscene on the Hawk after landing. If you go the "guns blazing" route then you could just load a separate module. Otherwise you'd get the vanilla module. That would maintain compatibility with existing Korriban mods with minimal issues, although certain mods might need extensions to have their content appear in the other module.