Super Smash Bros Brawl cut stage?

[UnleashedGamer]

Hey! Today I was looking at old Brawl trailers and while watching I saw some clips from a stage I couldn't recognize, it looks like Shadow Moses Island at first, but after looking at it for a while I saw that the stage layout and the background was nothing like SMI. When I tried to search for some info on the internet I couldn't find any. I guess it is from Metal Gear Solid, but I have never played a game from the series so I may be wrong. But anyways I wondered if anyone knew anything about the stage like if it was cut from the final product, if this was an early stage of development of Shadow Moses Island and other info if you know. I would really appreciate if you could answer me

Trailer: https://www.youtube.com/watch?v=Itl9SHK7g5Y

FYI: This may be Shadow Moses Island, but from an angle I haven't seen, if it is please let me know.

 

[Booster]

Might be from Snake Eater, I'm not sure

 

[EmblemCrossing]

From what I remember, from all the beta Smash info I read, it's the early version of Shadow Mosses, before they moved it to were the stage is now.

 

[Skyfox2000]

Might be from Snake Eater, I'm not sure

Nope it's from Metal Gear Solid.