I will say this, it solidifies Godzilla as the most flexible character of all time. If you released Batman: The Movie or Batman Forever within a year of The Dark Knight, everyone would have *hated* it.
But you release a silly, late 1960s-style Godzilla movie months after the greatest Godzilla movie of all time and people love the stupid fun that it brings. Godzilla is impervious to tonal whiplash.