The trailer of 'Avengers: Endgame' has become the most viewed trailer in history by garnering 289 million views within 24 hours. "To the greatest fans in the world, thank you for being there from the beginning until the endgame," tweeted Marvel Studios. The last film in the 'Avengers' film series, 'Avengers: Endgame' is scheduled to release on April 26, 2019.