When the cast of the MCU are pulled back in time to watch their future- what will happen? How will the story change?

'Looks like we're watching this stuff, how bad can it be?'

very bad

Characters

Captain America The First Avenger (right before Steve gets the serum)

Peggy Carter
Bucky Barnes
Howard Stark

Right after Thor meets Steve and Tony

Natasha Romanoff
Clint Barton
Bruce Banner
Steve Rogers
Tony Stark
Thor Odinson
Pepper Potts
James 'Rhodey' Rhodes

Right before the dark world

Loki

Ant-man and the wasp (right before going into the quantum realm)

Scott Lang
Hope van dyne

Spiderman Homecoming (after Peter developed the webs)

Peter Parker
MJ
Ned Leeds

After Meeting Ego in Guardians of the Galaxy 2

Peter quill
Drax
Gamora
Nebula
Mantis
Rocket
Groot

After Doctor Strange (movie stuff)

Doctor Strange
Wong

After Black Widow

Yelena Belova

After Captain America: Winter Soldier

Sam Wilson
Fury

Kay that's it. If you find any characters missing (major ones) then please tell me. Hope you like this react fic.

Disclaimer: I don't own any of the Marvel movies or the characters. I only own the reactions of the characters. All the parts of the movies will be in bold.