Attention

Spoilers for Avengers:Endgame
Avengers 4 spoiler
Hi guys, I work in Marvel Studios and I'm a member of the VFX team for Avengers Endgame. I have watched some parts in the second and first act of the movie and I also know the entire plot. Spoilers below.

Act 1

Emergency Broadcast saying “THIS IS NOT A TEST. THERE IS A STATE OF EMERGENCY IN EFFECT. PLEASE STAND BY FOR FURTHER INSTRUCTIONS." Marvel Logo plays with Sta Lee Cameos and turns to purple colour. Scene cuts to Clint's farm, he trains his daughter. Family vanishes infront of him. He rushes to the TV an emergency broadcast plays.

Cut to Wakanda where everyone mourns. They decide to regroup and set for Avengers Facility.

Tony sees a dream where he has a son and everyone turns to dust.

Tony wakes up. A song is playing. Cut to a scene of Tony and Nebula playing paper Football. They are bored, hopeless and starving. Tony records his message to Pepper.

Tony and Nebula talk about their past and the Guardians. Tony doesn't want to die in space and they use parts of the Mark 50 armor and Nebula's hand to fix the Benatar.

The next scene cuts to Avengers Facility.Pepper hears the message after wearing a silver Iron Man armor [probably Mark 49] whose helmet was beeping. This is the photo which shows Pepper wearing an armor, and everyone thought was Rescue] She is relieved that Tony is still alive.

Avengers arrive and Pepper asks them about Tony, Avengers think he is dead. She gives them Fury's pager[which was recovered by police] and watches the news as the Death toll rises.Captain Marvel's arrival scene. She is looking for Fury and they tell her Fury is dead. Thor blames himself for the snap.

Scene cuts to Tony and Nebula, who repair the Benatar. They enter a jumpoint and as they move towards Earth the Sunlight flashes towards Tony's eyes.

Pepper recieves the message.

Captain America shaves. [the scene from the trailer where he is wearing a vest.] Black widow calls him to check what's happening outside. They watch the Benatar arrive.

Tony and Nebula land. Pepper is happy to see Tony and hugs him, but Tony collapses to the ground. On the other hand, Rocket asks about the other guardians, Nebula is speechless.

Bruce takes care of Tony who is recovering in bed.He says Vision is dead but Bruce has taken all the intel Shuri had on Vision, and he is trying to rebuild him in a way, where he can survive without any specific power source.Steve goes to Tony's bedside.