If the NFL follows through with the rumored lockout in 2010 (which during a recession, will be a PR nightmare), I could see baseball being the biggest sport for a couple of years. But the World Series has so much working against it. (Length, No halftime show, Weekday games, more strategic than football). I doubt it will ever happen. On a side note, I think the NBA could really gain some steam by doing a bracket type system like NCAA Tourney. Top 16 teams, single game elimination would be really exciting.