Aquarium? Sounds like Depth.
Train? I think thats probably Street, the outdoor courtyard seen in trailer. I also noticed it on the start menu of the gamescom build. Has a nice city surrounding with tall buildings.
Lobby? Theres one called Arrival, thats probably the inside of the ship, theres a screenshot of Helena in it so its been seen.
Temple? The temple of the dragon has been seen in the last fighter chronicles video. Its that temple in the upper level of sakura.
Only one we havent seen is Primal going by the wiki.
They dont seem to be using these documentaries for reveals specifically but rather we catch glimpses. But I do suspect they may use one of these to reveal Mila. Perhaps one or the next will be centered around characters and they will discuss her then.
I'm not talking about just a glimpse, but actual game play.
Temple has not been shown in
game play it's not Sakura. I think Street and Train could be separate levels.
Train could be Arrival, Ryu H. in the Declaration trailer was standing on top of a building, but on his right there was a subway station.
According to this link
http://www.freestepdodge.com/wiki/doa5-stages/ I'm guessing that's where you got the info for the stages.
Arrival, Primal, Street,Temple, and Lab has not been shown in game play. Depth like you said is probably Aquarium which I'm thinking was not fully shown, there's possibly more just so you can see the Aquarium.
Did you see a Subway station in the Street Level?
Here's the first and original leak for the stages and it list
Lobby as one of the stages:
http://neogaf.com/forum/showthread.php?t=465472&page=22
However the wiki could be incomplete example: Sanctuary was not on the list.