Strongest threat which Cecil Stedman, Amanda Waller and Nick Fury can save our world from?

The Earth they have to save is real life Earth, with the exception being that they are their government agencies also exist. They have one year to prepare for threat.

Round 1: Other than superheroes and supervillains, each organization has all of its resources.

Round 1: Each organization has only its resources which actually exist in the real world.