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The latest Avengers blockbuster is getting almost as many raves as it has superheroes, with one critic calling it "a supremely entertaining showdown".
Featuring most of the characters from the MCU (Marvel Cinematic Universe), it shows Iron Man, Black Panther et al unite against an apocalyptic threat.
Yet its critic does suggest that having so many superheroes populate the same film "means they're all less special".
- Why all the snobbery about superhero films?
- From financial ruin to history's biggest film franchise
Doctor Strange (Benedict Cumberbatch), the Incredible Hulk (Mark Ruffalo) and the stars of Guardians of the Galaxy also feature in the two-and-a-half hour film.
Their adversary is Thanos, a computer-generated villain who seeks to collect six "infinity stones" that give their owner power over reality, time and space.Image copyright Marvel/Disney Image caption
Attendees at screenings held in central London on Wednesday were exhorted not to reveal details of the film's plot that are not already in the public domain.
"Don't spoil it for others, the same way you wouldn't want it spoiled for you," read a message written by the film's sibling directors, Anthony and Joe Russo.
"Fans will be dumbfounded by the direction the movie takes the Marvel Cinematic Universe," he writes in his five-star review.Image copyright Marvel/Disney Image caption
Avengers:Infinity War will be followed next April by another Avengers instalment that has yet to have an official title.
Yet fans will not have to wait that long for more MCU fantasy, with a second Ant-Man film due out in August and a debut outing for Captain Marvel scheduled for March.
Our verdict, by entertainment reporter Neil Smith
"Thanos demands your silence," critics were told at the packed screenings that took place on Tuesday night in London's Leicester Square.
And there will be many film lovers who will be avoiding the internet today, in case their own viewing experience is spoiled by people in the know revealing too much.
So what can we write about Avengers:Infinity War?Well, it won't ruin anything to say it's an efficient, engrossing and entertaining spectacle with some craftily sprung surprises.Image copyright Disney/Marvel Image caption
Its vast ensemble cast features most (if not all) of the characters we've been introduced to over the last 10 years, many of them assembled in rewarding new configurations.
Keeping so many balls in the air has ramifications for the plot, which is spread over a number of locales and is sometimes confusing.
As they did in the two Captain America films they co-directed, though, the Russo Brothers make some bold choices fans won't stay silent about for long.
- ^ The Guardian (www.theguardian.com)
- ^ Variety (variety.com)
- ^ Why all the snobbery about superhero films? (www.bbc.co.uk)
- ^ From financial ruin to history's biggest film franchise (www.bbc.co.uk)
- ^ Daily Mirror (www.mirror.co.uk)
- ^ Screen Daily (webcache.googleusercontent.com)
- ^ Total Film (www.gamesradar.com)
- ^ Digital Spy (www.digitalspy.com)
- ^ The Telegraph (www.telegraph.co.uk)
- ^ Facebook (www.facebook.com)
- ^ @BBCNewsEnts (twitter.com)
- ^ bbcnewsents (www.instagram.com)