Box Office Preview: 'Avengers' Passing $800 Million Worldwide, Could Hit $1 Billion By Sunday

Disney and Marvel Studios' The Avengers is expected to cross the $800 million mark Thursday, putting it on course to hit $1 billion in global grosses by Sunday or early next week.

our editor recommends

'Avengers' Damage to Manhattan Would Cost $160 Billion, Disaster Expert Estimates (Exclusive)

5 Hidden Reasons Behind 'Avengers' Record-Shattering Success

'Avengers' Writer-Director Joss Whedon on His 'Insanely Massive Ego' (Video)

If it reaches the milestone on Sunday -- its 19th day in release -- it will be on par with with Avatar and Harry Potter and the Deathly Hallows Part 2 in terms of record-breaking speed.

PHOTOS: 28 of Summer's Most Anticipated Movies: 'Avengers,' 'Dark Knight,' 'Prometheus'

Through Wednesday, the superhero tentpole directed by Joss Whedon had grossed $775.4 million worldwide, including a Wednesday take of $31.2 million. Last weekend, it scored the biggest domestic debut of all time with $207.4 million.

STORY: Box Office Shocker: 'Avengers' Scores $80.5 Million, Second Biggest Opening Day of All Time

This weekend, Avengers has a strong shot at grossing $100 million domestically and $100 million overseas. But those numbers could come in lower if the drop is bigger than expected.

The only new wide release of the weekend is Tim Burton's campy adaptation of the 1966-71 daytime soap Dark Shadows, which begins rolling out at midnight Thursday in the U.S.

VIDEO: 'Avengers' Stars Chris Evans, Chris Hemsworth on 'The Birth of a Team'

The Warner Bros. pic, headlining Johnny Depp as a vampire, is tracking to open in the $35 million to $40 million range domestically. It also opens in 42 markets overseas, where Depp is a huge international star.

Dark Shadows could beat Avengers in certain territories but might not be able to match Avengers' overall weekend international gross. Burton's film got off to a strong start Wednesday in France, grossing roughly $770,000 to beat Avengers on its third Wednesday.

Produced for $100 million, Dark Shadows is tracking best among women, though interest has picked up among men in recent days. The film also stars Michelle Pfeiffer, Helena Bonham Carter, Eva Green and Chloe Grace Moretz.

Warners believes the film will have strong legs, since the other May tentpoles are more male-driven, including Universal's Battleship, which opens May 18.