Does he have a financial stake the the movie Hero, or did he just like the movie and want to get his name attached to it? Or is it just a marketing gimmick? As far as I can tell from the trailer, he had nothing at all to do with the making of the movie.
The movie was made in 2002. Basically, Tarantino talked Mirimax into bringing the film to the US. Here an article with some info.
He doesn’t have anything to do with the production. There’re a bunch of “Quentin Tarantino Presents” movies on DVD that are older than he is. I think what he’s doing is putting up the distribution money to get these films released in theaters and on disc. I think he puts his name on them as a sort of “seal of approval.” It means Quentin thought that particular movie was really cool. While there’s clearly a fair amount of egotism involved, I have to admit that as a marketing gimmick, it works. I like all of Tarantino’s movies, so it stands to reason that I’ll also have an above-average chance of liking other movies he likes. If I were undecided about seeing a particular movie, seeing his name associated with it would be enough to tip the scales.
There’s also a downside. I went to Hero with the greatest reluctance, because Tarantino’s name was attached.