Caveat: not as brutal/bloodthirsty as that in the James Caan/John Houseman/Moses Gunn movie in 1975, but still plenty violent in its own right. I'm thinking something like Ultimate Fighting on rollerblades, combined with the smallest bikes Harley makes (can't be real hogs given the size of the arenas and banked track).
You'd probably have domed stadia along the general size of the Syracuse Carrierdome, seating perhaps 30,000. Chances are there would be a major TV contract everywhere. I would also bet that it would be about as popular as soccer-maybe even more so-in Europe and South America (can you imagine the grudge matches between, say, Berlin and Moscow, or Rio against Buenos Aires?).
You'd probably have domed stadia along the general size of the Syracuse Carrierdome, seating perhaps 30,000. Chances are there would be a major TV contract everywhere. I would also bet that it would be about as popular as soccer-maybe even more so-in Europe and South America (can you imagine the grudge matches between, say, Berlin and Moscow, or Rio against Buenos Aires?).