Here are the reports:
Andy McCullough of the LA Times that Darvish is waiting for the Dodgers to shed money:
Link: My understanding is that Yu Darvish has made clear he would like to return to the Dodgers, and part of the delay in his free agency is related to waiting to see if the team can move some of the money. The Dodgers have explored scenarios for moving useful but (theoretically) extraneous assets such as Yasmani Grandal, Logan Forsythe and Hyun-Jin Ryu. Given the fact that those players are still Dodgers and Darvish is still a free agent, you can guess how the market has reacted to this gambit by the front office.
T.R. Sullivan (Rangers beat reporter) for MLB.com saying all signs are pointing to Darvish wanting to return to Texas:
Link: It seems obvious -- reading all the signs -- that Darvish wants to return to the Rangers. The problem is the Rangers keep saying that it is "unlikely" that they'll be active at the top of the free-agent pitching market. Certainly the term "unlikely" leaves wiggle room, and the tedious dance continues with Rangers fans left tantalized by the wait.
Despite all other factors being tossed about, Darvish could be the one keeping the free-agent market from moving. He is the top starting pitcher on the market, and those guys usually sign in November. If Darvish were to sign, it could break the inertia. But he may be waiting to see if the Rangers blink first.