Yea I was thinking that you could be ambushed by Rakatan hunting parties while exploring the ship or something. The Endar Spire is basically the same type of ship as the crashed one right? Well maybe you could enter from the sub-level of the ship which could be a recycling of the Hrakart station from Manaan (only part of it, like some of the hallway and a pressure room with water) and you find an elevator that takes you up to the upper level(s) which would be the actual ship part (re-use of Endar Spire). Even if adding a new sidequest is too difficult (well you could make the survivors all alien so then they would either speak Huttese or something else
) or just make it a place where you can find extra loot and maybe kill some extra enemies.