Apart from counting down the days until its release, there is one thing that Marvel fans around the world have been doing since they first watched the trailer for Avengers: Endgame - specifically, wondering just what will happen to Tony Stark?
We already knew that Marvel's legions of enthusiasts weren't the only ones concerned. NASA was worried too - and now Robert Downey Jr., aka Tony Stark, aka Iron Man, has tweeted his gratitude.
The tense trailer raised many questions about where Earth's mightiest heroes were left at the end of the last film, but it was the fate of Iron Man himself - who we last saw floating through space, out of food and almost out of time - that provided the most poignant note.
Understandably fans were very, very concerned by this - you can't kill Iron Man, surely? He's the best one.
NASA was inundated with messages from people asking them to do something for their stranded hero.
One fan wrote: "Dear @NASA, PLEASE please find Tony Stark. That poor guy is floating somewhere up in space and is running out of oxygen. WE NEED YOUR HELP."
Houston finally responded and said they would keep an eye out for the missing pod.
In a tweet, they wrote: "Hey Marvel, we heard about Tony Stark. As we know, the first thing you should do is listen in mission control for 'Avengers, we have a problem.' But if he can't communicate, then we recommend ground teams use all resources to scan the skies for your missing man."
But now Robert Downy Jr, who plays the superhero in the Avengers films, has replied to NASA.
In a tweet he wrote: "Always good to know @NASA has your back."
To which ground control said: "Failure is not an option."
Good to know!
The trailer shows the billionaire tech genius seemingly losing all hope. resigned to the fact that his luck has well and truly run out, as he records a final message for his fiancée Pepper Potts.
A tired Stark stares into his Iron Man mask and says: "Dear Miss Potts, if you find this recording don't feel bad about this, part of the journey is the end. Just for the record being adrift in space with zero promise of rescue is more fun than it sounds.
"Food and water ran out four days ago, oxygen will run out tomorrow morning and I mean it, when I drift off I will dream about you, it's always you."
So how will things turn out for ol' Tony? Looks like we'll just have to wait to find out - Avengers: Endgame is set to be released on 26 April 2019.Featured Image Credit: Marvel Studios