Lego may never get around to releasing Fantastic Four based Minifigures, but that doesn’t stop people from obtaining their own. With a recent appearance in the Lego Marvel Super Heroes video game there is some hope that these may one day be official. These four Minifigs are actually extremely well done “knock offs” by Sheng Yuan, and are sold individually. These Minifigures are a part of a greater Fantastic Four themed release, featuring Mr. Fantastic, Human Torch, Invisible Woman, The Thing, Flaming Human Torch, Pyro, Silver Surfer, and the great Dr. Doom. These are surprisingly detailed, with the Thing being the break out star of the bunch.
Check out some photos of the Lego Fantastic Four, by Misha Mishin, over on Flickr: https://www.flickr.com/photos/misha-mifody/16814867387/
And, there are some more details about the Sheng Yuan Minifigures here: http://mybrickstore.blogspot.com/2014/10/lego-fantastic-four-by-sheng-yuan.html