Re: Isn't it really hinted at in previous Fallouts?
It's important to bear in mind that DLC is supposed to be extra OPTIONAL content.
So far we've had:
1) Operation Anchorage, which added a mtro tunnel and some ruined buildings to wasteland, and then a big computer simulation of the battle of Anchorage, outside the normal Captial Wasteland
2) The Pitt, a slave community outside the normal Capital Wasteland
3) Broken Steel, adding new quests and new enemies to the pre-existing Captial Wasteland
4) Point Lookout, a mutant hillbilly community outside the normal Capital Wasteland
See a pattern? Apart from Broken Steel, all the DLC has been adding additional locations outside the main wasteland map, where you lose your companions and you often loose all your equipment too. They are extra optional "side missions" that are outside the normal game.
They are running out ideas for these outside games. I mean, seriously, where next could the player go? You've gone to a swamp by boat, and to Pittsburgh by train. If you want a whole big new location you'll have to wait for Fallout: Las Vegas.
So, where else can they go? Where can they put new adventures? The only place was up, in space.
Personally, I'll always consider the existance of aliens as being canon in Fallout. Godzilla's footprint or the Doctor's TARDIS leave no lasting impression on the game, but I can't think of the gun that I singlehandedly used to wipe out the Master's army to just be a silly extra joke item.
Morbus said:
Er, sure the talking brahmins might have had descriptions when you examined them in the special encounter, but it is not like you got to carry around a talking brahmin with you in your inventory for the rest of the game, and watch it kill enemies or have conversations with them.
When people talk of easter eggs, they mean stuff like the appearence of Dopefish in varioius games (the Quake games, Sin, Descent 3, Max Payne, Anachronox...). Doesn't significantly change anything in the game, it's just a few seconds of amusemsent.
The talking brahmin and the Doctor's TARDIS and godzilla's footprint fit into those categories. The special items in those encounters (Stealth Boy etc) were standard generic game items you could also find in other locations.
By contrast, the alien encounter had its own special unique item that you could take and use anywhere, repeatedly, to kill anyone and everything. Rather than a brief joke, it's a game changer, and I can't consider a game changer to just be an easter egg.
We all know that Fallout's original developers would never have put a full blown alien invasion into Fallout 3 or Fallout 4. That isn't supposed to be what Fallout is about. But I do think it is far for Bethesda to say that the existance of aliens has been hinted at throughout the series. Fallout 1 had the special encounter, the alien blaster weapon, a weird corpse in The Glow and a random brotherhood line about aliens. Fallout 2 had Skynet's claim that he was made with alien tech, and an opportunity to buy the alien blaster from a trader. Bethesda took it a step futher by adding a crashed ship and alien blaster as a fixed map location in Fallout 3. By that point, that's a reference to aliens in all three games. Not enough to justify alien abductions and invasions and stuff, but at least enough to say "aliens are canon" rather than a mere easter egg.