‘Tony W’ tells us the 20th Century Fox website has updated and now includes the studio’s official synopsis for Fantastic Four:
Marvel’s beloved superhero team comes to the big screen. Reed Richards / Mr. Fantastic, who can elongate his body; Susan Storm / Invisible Woman, who not only can become invisible at will but can render other objects invisible; Johnny Storm / Human Torch, who can shoot fire from his finger tips and bend flame; and Ben Grimm / The Thing, a hideously misshapen monster with superhuman strength, together battle the evil Doctor Doom.
Source: Tony W