Exactly. My point is that the Ray Gun is a common, cliche'd peice of 1950's era sci-fi equipment that isn't unique to a single sci-fi universe, unlike the TARDIS or the Federation of Planets. Because of this, Bethesda is free to run with it however they please, unlike TARDIS or the Federation of Planets, which are iconic and tend to shout "I'M A EASTER EGG!"
Okay. I think I get what you're driving at. But I still don't see how that gives it any particular properties over anything else that would lend it more towards one or the other.
But like I said - I think all this is just over-complicating the issue. "Canon" in a (relatively) non-linear videogame, is something I feel is largely irrelevant. If we're talking Marvel comics or something, where the narrative is always the same no matter how many times you go through it; that's one thing. In a game like Fallout - as far as I'm concerned, "canon" is what happen to
my character. What you did with yours is something that has no bearing on "my canon" of the game. I can play all three Fallouts to a number of different conclusions - "canon" only ever comes into play when the next game comes along to tell me if anything
had to have happened.
For example, in my "official" playthrough of Fallout 1, during the endgame wrap-up Shady Sands pretty much died out; and I never did come across a crashed flyin saucer (just never happened to roll that particular random encounter.) For Fallout 2, the opening setup is that Shady Sands turned into NCR. So that over-rode my canon of the events that took place in Fallout 1. So that the game makes sense. Since there's no mention of any alien spaceship my character came across in Fallout 2, that continues to be my own canon of the game - that there was no alien ship in Fallout 1.
Why should it matter if there's aliens in the game or not? My character never ran into any until Fallout 3 (at least the ones that I consider my own "official" playthroughs.) What does it matter what's "canon" when it never happened to my character?
If there's a part in Fallout 4 where a main character goes "remember that time that kid from Vault 101 got abducted by aliens?" then it'll be official canon. But otherwise, the only thing that matters is what my own character did in that game. If "canon" is about what "officially" happened in the game - then it's only relevant to what happened to my character in the game. In Fallout 3, you can save Megaton or blow it up? Which one is canon? The answer is going to be - whichever way they set it up in Fallout 4. If it even comes into play. Otherwise, "canon" is going to be: "whatever my character did."
In other words - canon is only relevant as far as what specific things had to have taken place for the setup of the next game to make sense. MZ being canon is about as relevant as whether or not I blew up Megaton, or what I did with Gecko in Fallout 2, etc. If the next game doesn't mention it, or make a big deal about it - then it's up to what happened in each person's game. That's the "point" of an RPG, isn't it? That I'm telling my own story? Isn't the "point" for my narrative to be different from yours? So in short - "canon" is what happened in
my own game (with the exception of events that have to have taken place for the setup of the next game.)
If Fallout 4 opens with a flashback of your character being abducted by aliens; or if the opening cinema is a bunch of aliens talking about that time they abducted you - then sure, it'll be canon. Otherwise, though, it's about what happened to "your" character. If you end up playing MZ and like it, then great - that's your canon for your playthrough. If you didn't play it, then it won't be. I don't see what's so hard about that. I really don't think there's some sort of blanket answer we need to nail this thing to.