That's exactly what he is. During the process of writing the story of Rises with Goyer, the discussion shifted to Superman, and Nolan was so impressed with Goyer's idea of a modern, post 9/11 Superman, that he gave the president of WB a call and pitch that idea. And since WB was looking to make a Superman film anyways, due to their legal entanglements, a film was gonna happen with or without Nolan and Goyer. But having Nolan on board wouldn't hurt. He is on board (willingly or not) simply to lend his good name with the general public, and reading the dumb comments on Youtube, it seems to be working. He certainly didn't have an active role beyond that phone call, as he himself as admitted to. Heck, he never even met the lead of the film, Henry Cavil.