Cap, Hawkeye, Black Widow, Phil Coulson, Stark (no Armour), Fitz, Simmons, May, Daisy, Yo-Yo, Bobbie, Hunter, and Mac are teleported to the Fallout universe.
Scenario 1: Fallout 3, inside Vault 101 (the Vault is empty).
Scenario 2: Fallout 4, (they awaken from surprise cryo-sleep).
How do they react? What do they do? Can they survive? If necessary they can get the most basic knowledge possible of their surroundings (like the main characters do at the start).
What is their reaction to this world? Who do they interact with? What sides do they take? Who are their friends and allies? What interaction would be the coolest/most fun?