Avengers detect a pink Genie-like monster destroying Manhattan City and toying with population. they got 15 min watching the monster and analysing him.
the pink genie is Kid Buu
The Avengers interfering are :
Iron Man, Hulk, Thor, Ms. Marvel, Vision, Scarlet Witch (no HOM version), Pietro.
Avengers can use the best of their equipements,
fight in Manhattan,
Buu doesn't bust the planet.