WATCH: The first trailer for Avengers 4 is here and things look grim

Welcome the Endgame.

"Part of the journey is the end." So goes the tagline for Avengers 4, aka Avengers: Endgame. That's right, it finally has a proper subtitle and one that rings out an intensely ominous note. How could it not after the events of Infinity War? As Black Widow sagely notes, Thanos succeeded in his mission and - spoilers for a film you ought to have seen by now - wiped out 50% of the population on planet earth. Strong heel work from the man, and surely a reckoning must now come his way with the few Avengers who are still walking around. "It's the fight of our lives," sighs a withered-looking Steve Rogers as he gets set for what many are speculating will be Captain America's final battle. Tony Stark, meanwhile, cuts an isolated and broken figure of his own in the new trailer, which to be fair does offer a small bit of levity at the end. Also, that guy we all freaked out about not being around last time? Keep an eye out. How will they defeat Thanos, though? Take a look at how everyone is holding up in the first official decent look at what's coming next summer below... https://www.youtube.com/watch?v=hA6hldpSTF8 Clip via Marvel Entertainment