The Assembly Hall in Bloomington, Ind. stood gray and gloomy, matching the drizzly December afternoon. Inside, where there should have been fans yelling and pompons shaking and a basketball floor gleaming, there was nothing but darkness and wet gravel. For more than three years construction men have been blasting out limestone and piecing together concrete slabs, preparing this 17,500-seat home for the University of Indiana’s Hurryin’ Hoosiers.