I think it's pretty meaningless...inviting the champions from each continent can make the tournament exciting but still think it's more related to money issues...well, let's say like Japan perhaps wants to show how they influence on volleyball and FIVB.
I'm not such a big fan of asian volleyball and Russia, Brazil without their best players...nothing so fun to me.
The only excitement is to see Glass's insane fast sets and Larson's come-back.