India, June 3 -- When James Cameron was making Titanic in the mid-1990s, reports of its extravagant budget had taken Hollywood by surprise. The film cost $200 million to make, and millions more were spent on its publicity and marketing. It took a windfall at the box office to ensure that Titanic did not sink (pun intended). So, imagine a film that is costing its makers several times more, and has a $250-million budget for cast salaries alone. The new most expensive film ever made is a gargantuan project that may put infrastructural undertakings to shame.

Marvel Cinematic Universe's (MCU) upcoming crossover event film Avengers: Doomsday will soon have the title of the world's most expensive film. Collider recently reported that Marvel has...