I noticed this area on the map when wrapping up Nar Shadaa, it's north of the dock flats and west of Vogga and his warehouse, it looks like an area that was planned to be used but then left alone, connected to by two unopenable doors. Will this corridor be reopened by any of the restoration projects?

(picture attached)

 

It's not the same place Mira took the Exile and drugged him/her? I thought that was in the flats, where you later meet/fight the Jedi Master.

There are a few areas like this in the game. You will also find another bar on Nar Shadaa, right behind the door where the Trandoshan who tells you about the bounty hunters stand. There are a few others on Onderon, Dantoine and Malachor too.

 

You can open any door in the game with the "whereami armband": http://www.starwarsknights.com/tools.php and visit those areas.