Spielberg’s Harvey remake to star Iron Man?

According to this site here, it seems certain that Steven Spielberg will announce Robert Downey Jr. as the star to fill Jimmy Stewart’s shoes in the remake of the oddball 1950 film, Harvey. Early speculation was either Tom Hanks or Will Smith.

The movie is about a drunk who sees a huge 6 foot rabbit and befriends him. What do you all think?

Source: Cinematical