That would be Robert Zemeckis.
They'll use the original script of "Wizard of Oz," so what's the point? Better scenery and special effects. More realistic characters? Have Dorothy be a real child... but do we want a real Scarecrow, Lion, and Tin Man as opposed to guys in Scarecrow, Lion, and Tin Man costumes? Maybe just better Scarecrow, Lion, and Tin Man costumes? Eh... it's hard to picture. Warner Brothers wants to do it because they already own the script and they want to compete with Sam Raimi's Disney project "The Great and Powerful Oz."