The Dark History of the Sectoid!

Possible SpoilersI screenshotted these scenes from a XCOM EU trailer. They seem to regard where the aliens came from, specifically the sectoid.#1The first picture shows sectoids that appear to be enslaved. They are in a line with bound together by a chain of sorts.#2The second picture shows sectoids in the same tanks of fluid that we see humans put in when the alien base raid is started.#3The third pic is actually of a heavy floater instead of sectoid. It’s connected to something off screen by several metal tubes. My best guess is that it might be the testing of the heavy floater before it was put into use.These pictures come one right after the other in less than a second. You can see the video I got them from and the minute:second mark in the photos. Go take a look at the video or just use the pictures here. Either way, tell me what you think below.