With Correa, the real dark horse is the Nationals.
They won everything 3 years ago, and still have some big contracts in Corbin and Strasburg. They do have a bunch of solid young, cheap players lead by Juan Soto (who will be leaving this list soon, as he should start making real money), Keibert Ruiz, Victor Robles, Josiah Gray, Tanner Rainey, and Carter Kieboom.
Why not?
I think the Yankees look for a short term option and hope one of Peraza or Volpe pans out. Simmons and IKF are both good options. Taking the the last year of the contract of Elvis Andrus might lessen what it takes to pry Matt Olson out of Oakland. Maybe a reunion with Grigorius, freeing up Philly to pursue Correa?