What If... (Vol 1) #29: The Avengers Were the Last Superheroes on Earth?

In order to battle the Scarlet Centurion, the Avengers spend months “tracking down all super-beings” to join forces.

But things don’t go according to plan as one by one, these super-beings are defeated and captured by the Scarlet Centurion for “rehabilitation”. Only five Avengers remain to defend the earth.