Business Insider reports that tickets just became available for "Avengers: Endgame." The film opens in theaters on April 26. It's poised to become one of the highest-grossing movies of all time. The last Avengers film, "Avengers: Infinity War", broke several box office records. Ticket sites like Fandango are already overloaded. Some theaters showing wait times of more than an hour to buy tickets.
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