That's been the strong rumor, not sure if it has been made completely official. I don't really follow it regularly either. While the races end up on tape-delayed TV a week or two later, it is likely there is no actual TV money flowing in. More likely the TV production is an added expense and the goal is to gain more exposure. It probably functions financially a lot like short track racing, with the two sources being back gate participant fees and front gate admissions. Renting the arenas and building the tracks can't be cheap. I don't think it makes a lot of sense to have Supercross and Arenacross happening simultaneously with little coordination. Maybe it would draw a bit more attention if they ran it from October to January as a precursor to the SX season? Maybe another promoter will pick up the idea and it will be back in some form.