Portal 1, 2 & upcoming 3

[RayMonkay]

-in the trailer for portal 3 (coming out around 2017), it appears to take place both in and outside, you also appear to be Chell, which means that GLaDOS must have called you back, or you did actually get a job with, say, BLackNasa, such as stated in the song Still Alive, and they are using a destroyed Aperture Laboratory or have developed a similar laboratory themselves.

Where is that trailer exactly? Also I doubt Portal 3 will happen.