Batman and Superman as they appear in "Batman v. Superman: Dawn of Justice."
Batman and Superman as they appear in "Batman v. Superman: Dawn of Justice." - 
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"Batman v. Superman: Dawn of Justice" is opening this weekend.

It's a moment of truth that's a long time coming for the two heroes and for Warner Bros., which has had a tough year and is hoping "Dawn of Justice" will help kick off a vast, Marvel-style super-franchise. 

The film brought in an impressive $27.7 million from early screenings Thursday night, but critics haven't been kind.  We talked with entertainment corespondent Adriene Hill about the stakes and whether we've hit superhero saturation. 

Follow David Brancaccio at @DavidBrancaccio