There might be yao's route, it is unsure. There is only the main routes: William, Nikolai, Murdoch, and Cliff at the moment
Considering Echo has five routes: Leo (Jenna), TJ, Carl, and Flynn, mayhaps EchoProject can shoehorn one additional route in one of the already established routes? But whom I wonder~? Some of ya'll want Yao, others want Hendricks, I think Cynthia deserves a spot (a la a Jenna to Chase but for Sam). Regardless, I can't wait to see what's next!