"The Big Bang!"
In a scene from the far future, we see a jury give a death sentence a mysterious prisoner who is bound and imprisoned in a containment suit. The method of execution is to transport him in time to the moment before the Big Bang, where he shall expire in that indescribable blast of creation. Unfortunately, Reed has taken his family on a tour, intent on letting them witness creation as well from the safety of their Spacetime Ship. They see the doomed prisoner's plight, and rescue him, only to learn his identity. Blastaar intends on showing no gratitude to his rescuers, and the ensuing fight cripples the team's ship. Only one member has what is needed to save them, but he has sworn to never again use his powers, Franklin Richards.
*The F4 travel back to the literal dawn of time to witness the big bang. To their surprise, they are not alone...! *Source: marvel.com