Pakistan, Oct. 18 -- James Cameron has turned a box-office rivalry into a moment of mutual respect. The Canadian filmmaker and explorer congratulated Marvel after Avengers: Endgame reclaimed its title as the highest-grossing film of all time from Avatar.

On Friday, October 16, the Avatar filmmaker shared a special crossover artwork on Instagram showing Iron Man surrounded by the Na'vi of Pandora.

"YOU ARE ONE OF PEOPLE," the text overlaid carries Cameron's message congratulating Marvel and Avengers: Endgame: Encore for bringing moviegoers back to cinemas.

"CONGRATULATIONS TO MARVEL AND THE #1 AVENGERS: ENDGAME: ENCORE FOR BRINGING MOVIEGOERS TO THE CINEMAS! - JIM CAMERON," the message read.

The gesture followed Avengers: Endgame's ret...