Di Bonaventura, 58, is widely known by his first name alone; if someone mentions "Lorenzo," you know exactly who they mean. A longtime Warners executive, he has spent the past decade as Paramount's go-to guy for big action vehicles such as the Transformers and G.I. Joe franchises. The Transformers series alone has generated $3.8 billion at the box office, and he's trying to get Transformers 5 underway, with Bay back in the saddle as director. "We're both pretty straightforward guys who speak bluntly, so we've never had an issue," he says, somewhat improbably. Operating from a vast draftsman's desk that consumes a huge swath of his office, Di Bonaventura is expanding into TV with his television partner Dan McDermott, a former DW and ABC exec, with pilots at Syfy and USA. "The challenge," he says, "is maintaining your family at home and some semblance of life in L.A."