I don't know but watching that trailer has left me unimpressed. Those aliens look too cartoonish and I just keep thinking they're CGI, I know it's only a trailer but it gave way too much of the plot away as well.
I would disregard any of those reviews, reviewers are notorious for getting caught up in the hype for some movies and there were originally steller reviews for garbage like The Phantom Menace and The Crystall Skull (until they were oddly changed mysterously after the fact months later by those same reviewers when those movies were mocked by the large segment of moviegoers). It also seems the reviewers are all wowed by the technical achievements rather than the core of the movie.

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