Challenge Mode vs Main Game

[Nemesis296]

Ok so this is something that just recently came to my attention watching that new stealth video posted. Does it seem that the challenge mode is a time trial of a room full of guys that is pulled from the main game? Here is the latest video I've seen:
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The guy looks to be in the exact same room as the demo gameplay that Sefton Hill did back in June where he does the Silent Knight challenge mode in about 6 minutes:
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The new video shows what appears to be the same room, but when he is done killing everything, there is no timer and the game never officially ends (unless you count the video stopping). Are the challenge modes drawn directly from the story mode levels? I was originally under the impression that they were "separate" zones.

[JMCA]

I think that some are seperate zones but others are pulled from the actual game.

[Old_BenKenobi]

That Invisible Predator footage still amazes me months later.

[Gary_Bailey]

the guy in the first video certainly doesn't do well taking thugs out without getting shot

[Mystic_Klown18]

the guy in the first video certainly doesn't do well taking thugs out without getting shot

i noticed that too they should practice a bit

[Gary_Bailey]

but some of the takedowns were nice, when I play, I just want to short but sweet

[Reecio]

Yeah, some of them are sections from the main game. But like Dem Bones map I'm sure the extra downloadable content will be totally different.
If you notice, that level is also on the cameras in the ArkhamCare viral thingy :)

[ChristianBaleBatman]

I think you can compare it to Metal Gear Solid's story mission to it's VR Missions.

That seems apt, to me atleast.