True, but if we take miniscule evidence as the foundation for a theory, those little tidbits should be treated equally. Andromeda came up, just because someone thought that the blue, blurry nebula in the teaser's "Galaxy Map sequence" resembled that galaxy.
And in that case, you should apply Ockam's razor and route for the easiest solution (or the theory that uses the least amount of steps to explain a certain question). In this case, if Casey Hudson, the creator of the franchise (!!!) talks of "the galaxy" it is very, very likely, he is talking about the Milky Way.
Nebula? That's not a nebula bro. Basic astronomy knowledge disproves that. It most closely resembles a galaxy, and not the Milky Way.
It may be filler or concept art that is meaningless, but don't write off legitimate speculation with easily refuted counterpoints like "it's a nebula" or "it's the milky way" when it clearly isn't. At least support your argument with something tangible. And no, quoting "fly across the galaxy" doesn't count - because last I checked there were trillions of galaxies in the known universe.
Also, that not the way Occam's Razor works.
I'm all for being supportive of speculation and intelligent debate - even in this early stage of the game. But it goes nowhere if people a) get p*ssed over something stupid and b ) repeatedly present arguments that aren't relevant. Instead, acknowledge when the other side has good points, and the same should be done in turn.
For example, the Ark Theory supporters have good points - the image DOES resemble Andromeda, the proposal DOES avoid the ME3 endings and this is EXACTLY what Bioware stated they wanted.
The opponents also have good points - Ark Theory DOES stretch the lore to the extreme, it DOES require a drastic change to the setting to the point that it may turn off fans and it WOULD be thematically easier to base the story in the Milky Way.
Now, everyone act and debate civilly.