What could the Rangers get for Yu Darvish?

The Kansas City Royals
The Royals are beginning to look like a team of destiny once again. Late inning heroics, an average team on paper, and a desperate need for starting pitching. All the Royals need now is Darvish to be their 2017 version of Johnny Cueto.
The desire might be there, but the Royals have one of the worst farm systems in baseball. It’s hard to imagine them even coming close to what the Dodgers or Yankees have to offer.
The Milwaukee Brewers
The Rangers are going to regret trading Lewis Brinson for years to come. But unless the Brewers are willing to send him back, it’s hard to imagine them putting together a package enticing enough for the Rangers.
Even then, the Brewers would rather hold onto their guns than sell the farm for a rental which would be headed elsewhere in the offseason.
The Colorado Rockies
Rocktober is coming. The Rockies have a firm grasp on the second wild-card spot in the National League. Surprisingly, they don’t have a dire need for starting pitching.
Even then, it’s hard to imagine the Rockies can put together a package that would be enough for Darvish.