Conversation so far:
when did batman vs superman come to theaters
Batman vs Superman came to theaters on March 25, 2016.
how much was the budget for batman vs superman
The budget for Batman vs Superman: Dawn of Justice was 250 to 300 million dollars.
who directed batman vs superman
Zack Snyder directed Batman vs Superman: Dawn of Justice.
how did batman vs superman do in the box office
Batman vs. Superman grossed $166 million in the United States and Canada in its opening weekend, the eighth-biggest opening of all time, ahead of The Dark Knight Rises.

Question: what did the critics think of the movie
Self-contained rewrite: what did the critics think of batman vs superman