Super Skrull

Kl'rt is a Skrull with all the powers of the Fantastic Four, which earns him the appelation of Super Skrull.

The Avengers: Earth's Mightiest Heroes
Kl'rt is on the Skrull ship where the Skrulls' prisoners are stored. He considers Captain America too dangerous but is dismissed by his superior.

When Captain America leads the other prisoners to freedom, Kl'rt almost manages to stop them, but he's held off by Cap, who is then saved by Sue Richards.

Kl'rt is also part of the invading force at Washington DC. That force is defeated by the Avengers.