It is kind of interesting that the Honda race in Japan and the LB GP is one of the main holdups. On one hand I think Honda would be happy to have a unified series with additional cars and more exposure. However, as the article points out, LB is a Toyota event.

Here is another strange thought. If the Mazda Atlantic Series stayed in place, you would go to an Indy car race and see the Honda Indy Cars, Infiniti(Nissan) Pro Series and the Mazda Atlantic Series.

My head hurts thinking about all the things that would need to be done to figure this one out.