According to this story in Radar Online, Spider-Man 3 is now The Most Expensive Movie Ever Made, having cost upwards of $350 million - and that doesn't include promotion and marketing costs.
No one at Sony Pictures is really freaking out - at least publicly - because the movie is as much of a sure thing as a Star Wars sequel. Still, you have to wonder how these film budgets manage to get so enormous. Pirates of the Caribbean: At World's End is also rumored to be pushing towards a $300 million tab. End of the world, indeed.