Actually from what I remember most people foresaw this way in advance because Frozen was based on the Snow Queen, which originates from Scandinavia, and the idea originally was a possible expansion of Norway. This was before the film debuted, but the general consensus was "I could see that property being nestled in there" in the same way as Mary Poppins is at the UK. Subtle enough to draw people in, and easily folded in. Even when the Malestrom overlay was starting to be heavily rumored during the smash success of Frozen's run, the reaction was not "none of this makes sense", but like you said outrage over Norway being essentially a facade for a fictional country set in the same reigion.
Guardians of the Galaxy in Tower of Tower is a bizarre, out-of-left-field proposal since the two properties could not be anymore more unlike each other. Frozen in Norway was feared because they were so alike, even if the nuance between the two could be considered offensive.