The only game in town at the box office this weekend is Avengers: Endgame — and then some.

Marvel Studios and Disney's superhero juggernaut is virtually assured of shattering records with a projected global launch of $850 to $900 million, if not more. That could include a potential all-time best of $270 million to $300 million in North America, where it unfurls in 4,600 theaters, the widest release ever.

The big caveat is the tentpole's running time of three hours and 58 seconds. That means a reduction in showtimes. So far, Disney and theater owners appear to be making up the difference by adding additional screens and showtimes. And online ticket service Fandango says 4,000 shows are sold out.

The box office is in sore need of good news. Domestic revenue is running 17 percent behind the same corridor last year, although many believe Endgame could be the first of many 2019 juggernauts (many of them from Disney).