The side by side athletic venues in the big concrete off 880 have seen a lot of great moments. World Series and AFC Playoff games, "We Believe" games and the greatest rock'n'rollers of all time. [...] the happening here Sunday evening, between 66th and Hegenberger road is the biggest thing to ever happen at the Oakland County Coliseum Complex, or whatever corporate name you want to call it. Since Oct. 21, 1973, when the A's beat the Mets in Game 7 of the World Series, their second of three straight championships. The massive media line to get into the building is a testament to that as is the round the clock coverage, the marketing, the television ratings, the cost of tickets (face value for reserved seats in the 1973 World Series was $10.00) and the larger than life showdown between LeBron James and Stephen Curry.