Variety reports this morning that Steve Faber and Bob Fisher (you may not know them, but you love them - they wrote Wedding Crashers) have been hired by Fox to write "a comedy about a skinny American [Heder] competing as a sumo wrestler." The fact that the concept is loosely based on the experiences of writer Joshua Davis really doesn't do much to increase one's confidence in the project, since Davis only participated in sumo as a gimmick for his book about competing in what he described as "the world's most outlandish competitions." So, yeah - it's a movie based on a gimmick that was created to sell a book. Sweet.
Heder managing to stay famous until this movie comes out will be an accomplishment in and of itself. If he actually makes it funny? The dude'll deserve an Oscar.