On Tuesday, John Ourand & Michael Smith of Sports Business Daily reported that Fox Sports is "close to signing a deal that gives it half of the Big Ten's available media rights package."
Now, to be clear, the available media rights means the section of the league's rights that they don't keep for themselves via the Big Ten Network. If you prefer to think of it this way, Fox is acquiring half of the rights that ESPN currently holds.
This is both an unexpected and a completely expected move. Fox is already a majority partner with the Big Ten in the Big Ten Network, so it was the obvious move for Fox to want to snap up the remaining media rights.