RIJ: The event known as the Roswell incident supposedly had dead extraterrestrials, a populated area and many witnesses, but whether or not you believe, disbelieve or are agnostic about it, it's not broadly accepted as ever having been proven. Who's to say that this story would not be relegated to the same level, by the time Ripley and others happen to be depicted as alive? It could be listed as just one more UFO event and only specialist researchers would bother to pay attention to any descriptions. That's assuming a ship is even found by the general public. If not, then the only 'witnesses' would be those killed. The one who survive are only going to be able to report some maniac running around with blades and a gun, plus some monsters. If so, then there would be no reason for the general population to link them with extraterrestrials. Just an unexplained event. Who's to say how many wars could emerge in the meantime and wipe out any records to do with them? And the first film was spoken of as intentionally canon, by those involved. There was a reference to it being a new franchise, but that's more of an economic term: 'Voyager' was its own franchise, but it also happened to be canon, in regards to being a part of the 'Star Trek' franchise, as a whole. The interview, however, is regarded as fake by most. It never backed up its sources. The list of people allegedly attending the screening were never shown to have been anywhere near there.