Sounds like CNN is trying to accommodate the RNC by setting up a 10-on-1 debate dynamic instead:
http://money.cnn.com/2015/09/13/media/jake-tapper-republican-primary/
From his book "Trump...the art of the deal" (published in 1987)
Page 185 /186...
"I have great respect for what the Japanese have done with their economy, but for my money they are often very difficult to do business with.
For starters, they come in to see you in groups of six or eight or even twelve.,
You may succeed with one or two or three, but its far harder to convince all twelve.
In addition, they rarely smile and are so serious that they don't make doing business fun."
So Trump has been dealing with this type of situation for about 30 years.
He will do just fine in the debates today...and have fun doing it.
And Trump beats them all. He should go out tomorrow, presuming that is the result, with a tweak and in interviews that 10-to-1 and he won. He might ask in Trump style, “Is that the best you all can do?” Suggesting they might all pack it in and get on his campaign so that the Republican party can shift focus to the Democrats.