Fantastic Four (team)

The Fantastic Four is a super hero team that is based in New York City. There base of operation is the Baxster building. The team is made up of Mr. Fantastic aka Doctor Reed Richards, Susan Storm aka Invisible Woman, Johnny Storm aka the Human Torch and Ben Grimm aka The Thing. Together they battle the evil ruler Doctor Doom. Other enemies is Mole Man and the Skrulls. The Fantastic Four only appeared so far in Earth's Mightiest Heroes, and the Thing is the only member to appeared in Ultimate Spider-Man, Avengers Assemble and Hulk and the Agents of S.M.A.S.H.. The others made cameo's in Hulk and the Agents of S.M.A.S.H..

The Fantastic Four were created by Stan Lee and Jack Kirby.

History
There is various origin stories for the fantastic four but this is the basic one. The fantastic four was a team of scientists and astronauts that was doing experiments in Space. An accidenrt on return to earth happened. The ship traveled through a Radioactive storm and the team was changed on landing.

The Avengers: Earth's Mightiest Heroes
In "Ultron-5", Red Ghost with his Super-Apes manages to infiltrates to the home of the Fantastic Four. But arriving he found Black Panther and Hulk, who easily defeat him and his Super-Apes.

In "The Private War of Doctor Doom", The Thing and the Human Torch went to the Avengers Mansion to play cards. Meanwhile, Janet and Tony went to visit Sue and Reed. Doom uses these meetings to attack them simultaneously. Reed did not understand why Doom attack them knowing that they were accompanied by the Avengers. After a fierce battle, Doom decided to release Janet and Sue. It is revealed at the end that the Invisible Woman was replaced by a Skrull.

When the Skrull invasion began, the Invisible Woman (Skrull) sent the Baxter Building to another dimension but the Real Invisible Woman could enter into that dimension and return to its place of origin.