Although I vaguely remember the first part of it, it had to due with an experimental kind of time travel inside of a virtual world. Later in the dream a friend of mine who was with me in the virtual world explained that he had created a time machine with the exact same design physically, and was functional.
He led me to a place where it stood completed: a spherical machine that had a great resemblance to the Death Star. There were some children gathered around as well; sitting and waiting, watching attentively. My friend turned to me and explained that we needed to go back in time and stop ourselves from creating the time machine in the first place, but for whatever reason we decided to experiment with it first. A few people boarded the machine, and we decided it would be interesting to see what would happen if we traveled to the point before the Big Bang. The supposed pilot clicked a button and I suddenly realized that we would be leaving at that very moment--a malfunction of some kind.
I ran out of the machine before it closed and within moments it had vanished. Suddenly I became aware of the fact there was a television screen sitting nearby that had lit up and was producing static. The kids got up and crowded around it. I followed them over and watched the screen with a bit of anxiety. I got the impression what we were about to receive a message from the time travelers who had just gone back.
The first image appeared to be an old 1950's TV commercial with a boy smiling next to an old vacuum cleaner. Then the screen turned black and three bold yellow words appeared amidst some static:
WELCOME TO THE
The next image was of what appeared to be a young girl floating through the interior of the time machine--her face was badly burned and distorted, although I noted the fact that she didn't appear to have eyes or a mouth--where they would have been, it was just smooth. Her mouth opened and only two teeth remained. Then, flashing onto the screen was what appeared to be two people attempting to eat another of the crew mates, her recorded screams echoing throughout the room. I turned to see the kids watching the video, all looking attentive. My six year old cousin had appeared beside me, and looked up at me with a confused grin on her face (her teeth appeared to be gone too).
I walked away from the TV momentarily, feeling disgusted--I gathered that the only reason we had received the message was because they were unable to return to our time frame.
I looked back to the TV just in time to see the eyeless girl and another crew mate fighting over the attacked crew mate's intestines. Then, the footage went to static and I turned to my cousin who smiled and said, "That was weird."
And then I woke up.