I think FOX should ask Shawn Levy to reboot this franchise for them. He knows how to make big hits and if Real Steel is any indication, he is turning into a different director.
The guy flat out admits that he never wanted to be a kiddy comedy director. He always wanted to be a director than can tackle various genres, and is working hard to become one. He says that when James Cameron saw 20 min of Real Steel, he offered Fantastic Voyage to him.
He even admits that he would like to do a comic book movie. He has a good relationship with Fox and is working on a Frankenstien movie with them. Wouldn't be surprised if Fox offers him the Fantastic Four reboot. Infact, I think he could make a pretty solid action/adventure/sci-fi/comedy/dysfunctional family movie.