Ultimate Fantastic Four

Reed has traced Doom by backtracking the GPS trail from his robots. The military plan to go get him, which means that they'll likely never get the superpositioning codes they need to change Ben back. Their only hope is to get to Doom before the military do, but for that, they'll need a vehicle of incredible speed, and they don't have time to make one now.

Good thing Reed did built one when he was thirteen.